Issue No. 35-37/2018-Wednesday 05 September 2018 CERN Bulletin More articles at http:/ / home.cern/ -people

A WORD FROM... SUCCESS FOR AWAKE NOW GOING LIVE – THE LEARNING HUB AT CERN The experiment successfully accelerated with wake- fields generated by , a world first Education and training are essential parts of CERN's core mission, whether for high school teachers, summer students or our many public visitors. One particularly important audience for training is you – the CERN personnel. That's why we offer a wide range of learning opportunities, varying from the technical skills we need to carry out our jobs to the behavioural competencies we need to make our working lives run smoothly and the courses that enable us to stay safe.

(Continued on page 2)

In this issue

The final part of the AWAKE experimental facility, with the accelerating plasma cell and the scintillating screen News 1 used to detect the accelerated electrons and infer their energy. (Image: Maximilien Brice, Julien Ordan/CERN) Success for AWAKE1 Early in the morning on Saturday, 26 May plasma wakefields for accelerating elec- A word from...2 2018, the AWAKE collaboration at CERN trons. While traditional accelerators use LHC Report: 48 fb-1 and counting2 successfully accelerated electrons for the radio-frequency cavities, in wakefield ac- Decay of Higgs boson into bottom first time using a wakefield generated by celerators, the get accelerated quarks observed3 protons zipping through a plasma. A paper by “surfing” on top of a plasma wave (or describing this important result was pub- wakefield). Computer Security: An old scam in a lished in the journal Nature on 29 August. new disguise4 The electrons were accelerated by a factor “Wakefield accelerators have two different of around 100 over a length of 10 metres: beams: the beam of particles that is the Official communications 5 injected at an energy of around 19 MeV, target for the acceleration, known as 'wit- they reached an energy of almost 2 GeV. ness beam', and the beam that generates Announcements 7 the wakefield, known as the 'drive beam',” AWAKE (“Advanced WAKEfield explains Allen Caldwell, spokesperson of Obituaries 8 Experiment”) is a proof-of-principle the AWAKE collaboration. “Research and Development” project in- Ombud’s corner 9 vestigating the use of protons to drive (Continued on page 2)

Published by: CERN-1211 Geneva 23, Switzerland [email protected] Printed by: CERN Printshop ©2018 CERN-ISSN: Printed version: 2011-950X Electronic Version: 2077-9518 A WORD FROM... NOW GOING LIVE – THE LEARNING HUB AT CERN

Our range of courses is extensive and board, and further rounds of develop- Learning is good for you, and it's good extremely popular, but we felt that ment, the result is a one-stop shop for for CERN. And it just got easier! So things could be improved, which is why finding everything you need in the same dive into the Learning Hub (https:/ / lear we have invested considerable time and place. You can enrol in courses at the ninghub.cern.ch/ ) as of 10 September effort in developing the new Learning click of a button, read learning news and sample the rich world of learning of- Hub, which is being launched this week. and, among other new features, access fered by CERN. After several test workshops with learn- course documentation and consult your ers, whose feedback was taken on entire training history.

Doris Forkel-Wirth, James Purvis and Florian Sonnemann Head of the HSE Unit & Head of the Human resources department & Head of the Finance and administrative processes department

SUCCESS FOR AWAKE

Previous examples of wakefield accelera- electrons are then injected and “ride” the the first drive beams of protons were in- tion have relied on using electrons or lasers plasma wave to get accelerated. jected into the plasma cell to commission for the drive beam. AWAKE is the first ex- the experimental apparatus, and a - periment to use protons for the drive beam. “AWAKE has demonstrated that it can driven wakefield was observed for the first “Wakefield accelerators relying on protons achieve an average gradient of around 200 time in late 2016. In late 2017, the elec- for their drive beams can accelerate their MV/m,” says Edda Gschwendtner, techni- tron source, beam line and elec- witness beams for a greater distance, con- cal coordinator and CERN project leader tron spectrometer were installed. sequently allowing them to attain higher for AWAKE. By comparison, the Large energies,” adds Caldwell. Electron-Positron collider (LEP), which op- AWAKE will continue testing the wakefield- erated between 1989 and 2000, had a acceleration of electrons for the rest of Drive-protons from the SPS are injected nominal acceleration gradient of 6 MV/m. 2018. “We are looking forward to obtain- into AWAKE's plasma cell containing va- Gschwendtner and colleagues are aiming ing more results from our experiment to porised Rubidium. A laser pulse trans- to attain an eventual acceleration gradient demonstrate the scope of plasma wake- forms the Rubidium gas into a plasma by of around 1000 MV/m (or 1 GV/m). fields as the basis for future ac- ejecting electrons from the gas atoms. As celerators,” explains Edda Gschwendtner. the drive beam of positively charged pro- AWAKE has made rapid progress since its Although still at a very early stage of de- tons travels through the plasma, it causes approval in 2013. Civil-engineering works velopment, the use of plasma wakefields the negatively charged electrons within the for the project began in 2014, and the could drastically reduce the sizes, and plasma to oscillate in a wavelike pattern, plasma cell was installed in early 2016 in therefore the costs, of the accelerators. much like a ship moving through the water the tunnel formerly used by part of the generates oscillations in its wake. Witness- CNGS facility at CERN. A few months later, Achintya Rao

LHC REPORT: 48 FB-1 AND COUNTING

Since the recovery from the recent machine development period, the LHC has been in luminosity production mode, crawling its way up towards 60 fb-1

Since the recovery from the five-day the aim of attaining the 2018 goal of 60 then be back in production on Monday, machine development (MD) period that fb-1. The period of luminosity produc- 24 September, which coincides with the started on 23 July, the LHC has been in tion will be interrupted by another block of CERN Council week, by which time we aim luminosity production mode, crawling its MD and a second technical stop, starting to have passed the 50 fb -1mark. Another way up the predicted luminosity curve with on 12 September. The machine should four weeks of production before the switch

2 to the Pb run should then be enough to a vacuum leak in one of the main bend- ing week to reach the 50 fb-1before the MD reach the goal of 60 fb-1. ing magnets in sextant 3 of the accelera- and technical stop period should be feasi- tor, preventing any production of beam out ble, provided no serious issues loom on the The last few weeks have unfortunately not of the SPS. After investigation, the magnet horizon. been trouble free, as the injectors have had to be replaced and, since the system suffered from a series of issues that have had been at ambient pressure for some caused prolonged periods of beam unavail- time, prolonged pumping and conditioning ability. Not all of the unavailability trans- with beam were required before the usual lates directly into downtime for the LHC as, 144-bunch trains could be produced again in some cases, fills can be maintained until for the LHC. the injectors are available again. The LHC team did not sit idle, but used the The breakdown of an uninterrupted power downtime well by getting many of the inter- supply (UPS) in the PS complex at around ventions requiring accesses that were on 5 p.m. on Wednesday, 15 August was a the waiting list done. Once that had been good example of this. The LHC was in completed, they switched to setting up the The final two quarters of beam production before LS2, ion cycle in anticipation of the Pb ion run with the next MD and technical stop block in weeks 37 stable beams when many front-end com- and 38, a week of special physics runs as a place- puters (FEC) in the PS complex stopped that starts on 4 November. Initially, this cy- holder in week 41 – although this remains to be defini- working due to the UPS breakdown, mak- cle was set up without a beam, but as soon tively scheduled – and the end of the proton physics run scheduled for 27 October. ing beam production impossible. Although as the SPS could deliver single bunches, the actual UPS issue lasted only 4 sec- which was at around 5 p.m. on Wednesday, onds, it took 12 hours to fully recover the 22 August, these were used to validate machines and to resume beam production. part of the cycle. By the time the 144- The LHC managed to bridge the entire pe- bunch train was available from the SPS, riod with a fill that lasted 26.5 hours, which which was at around noon on Thursday, is long, but nevertheless a good 10 hours 23 August, substantial progress had been short of the record fill length. made on the set-up and an efficient switch was made back to the proton cycle to re- sume luminosity production. However, the next day a serious water leak was found in one of the 100 main PS mag- nets. Unfortunately, the LHC did not man- Since this last issue, the injectors have age to fill before the leak occurred and was had very good availability and the LHC has therefore without beam for the 22 hours it managed to fill when necessary. Despite took to repair it. all the issues mentioned above, close to 18 fb -1have been integrated since the recov- Multi-annual overview of integrated luminosity, with ery after the last MD block on Saturday, 28 2018 well on track to become a record year for the LHC. Not long after, at around 5 p.m. on Monday, July. This is an average of 3.6 fb-1per week, 20 August, the LHC had dumped the beam with 4.6 fb-1attained during the last week. to re-fill when, at nearly the same time, Therefore, accumulating 2.1 fb-1in the com- beam-induced losses in the SPS caused Rende Steerenberg

DECAY OF HIGGS BOSON INTO BOTTOM QUARKS OBSERVED

ATLAS and CMS have announced that they have observed this very-difficult-to-spot decay mode

Six years after the discovery of the Higgs or rock its foundations and point to new cle, such as the decay to a pair of photons, boson, ATLAS and CMS have announced physics. are much easier to extract from the back- that they have observed its decay into bot- ground. tom quarks. The result was presented on Spotting this common Higgs-boson decay 28 August at CERN by the two collabora- channel is anything but easy, as the six- To extract the signal, the ATLAS and CMS tions. year period since the discovery of the bo- collaborations each combined data from son has shown. The reason for the diffi- the first and second runs of the LHC. They The Standard Model of particle culty is that there are many other ways of then applied complex analysis methods to physics predicts that about 60% of the producing bottom quarks in proton–proton the data. time a Higgs boson will decay to a pair collisions. This makes it hard to isolate the of bottom quarks, the second-heaviest of Higgs-boson decay signal from the back- Read the full article here (https:/ / home. the six flavours of quarks. Testing this pre- ground “noise” associated with such pro- cern/ about/ updates/ 2018/ 08/ long-sou diction is crucial because the result would cesses. By contrast, the less-common ght-decay-higgs-boson-observed). either lend support to the Standard Model Higgs-boson decay channels that were ob- For more information, see the ATLAS and served at the time of discovery of the parti- CMS websites.

3 COMPUTER SECURITY: AN OLD SCAM IN A NEW DISGUISE

Money has always been a catalyst for greed and malice. Blackmail is one way to extort money from the innocent and has existed since ancient times

Money has always been a catalyst for of the webcam's livestream while the com- dress registered with CERN, we will let you greed and malice. Blackmail is one way puter was accessing webpages with porno- know! to extort money from the innocent and has graphic material, the attacker can threaten existed since ancient times. In the digital to release the video to all locally regis- Thus, if you receive such a scam e-mail world, blackmail is not unknown and there tered contacts unless a Bitcoin ransom is blackmailing you, please DON'T PANIC. are many ways to go about it. We have dis- paid. . . The new twist? The e-mail does And for sure, do not pay any ransom cussed some of them in previous Bulletin not only include this threat but also now money! The only thing you should do is articles (“Malware, ransomware, doxware references a real password previously tied to change the password revealed in the e- and the like”). Recently, there has been a to the recipient's e-mail address, which mail – if you recognise where it was used. clever new twist on an old e-mail scam that makes the scam much more believable!!! Consider terminating that specific account. might make the con far more believable. To be more proactive, recall these sim- How come? Passwords are a neces- ple principles to keep your digital life se- A message received at CERN or elsewhere sary token for protecting your data in any cure: keep all your devices always up- claims that your computer has been com- web service. CERN INDICO, CERN EDH, to-date by using the operating system's promised and the attacker has full access Facebook, Twitter, Amazon, etc. Hence, auto-update feature (“‘WannaCry’? The to your device. This is not beyond the they are usually stored in combination with importance of being patched”); choose realms of possibility as computers always an identifier (i.e. your e-mail address) for complex and/or long passwords and keep have some vulnerabilities that haven't been that web service – but not always in a them to yourself (“CERN Secure Password fixed yet (by you or the developer of the op- perfectly secure fashion. At CERN, we Competition. . . ”); have different passwords erating system). And “full access” really im- protect your password in accordance with for different sites and different purposes; plies full access: to the documents stored best practice, converting it into a non- and do not click on links in e-mails or on on that device like photos, videos, bank recoverable string (technically a “salted webpages whose origin you don't trust or statements; to the buffer of its keyboard so hash”), but some other sites might store which look dodgy (“A free click for your that every keystroke – including any pass- your password in clear text. If those web- awareness”)! words being typed – can be logged and sites are infiltrated, all clear text passwords stolen; to its screen and whatever is dis- are exposed and the access protection for Do you want to learn more about com- played on it snapshotted by the attacker; any other data is completely lost. From puter security incidents and issues at and to the attached microphone and web that moment, all data can be considered to CERN? Follow our Monthly Report. For camera. In the last case, this allows the at- be involuntarily public. This is happening further information, questions or help, tacker to spy on any activity committed in more often than you might think. Whenever check our website or contact us at the vicinity of that computer (see also our the CERN Computer Security Team learns [email protected]. Bulletin article “Curiosity clicks the link”). about newly exposed passwords linked to And the attacker can play dirty tricks with your CERN e-mail address or any other ad- The Computer Security Team that power. By claiming to have a recording

4 Official communications

HUMAN RESOURCES DEPARTMENT: 2017 ANNUAL REPORT ON THE SETTLEMENT OF DISPUTES AND DISCIPLINE

Introduction Article S VI 2.02 of the Staff Rules stipu- administrative decisions taken by the lates that, having regard to the gravity of Director-General. The Annual Report under Chapter VI the breach or misconduct in question, the (“Settlement of Disputes and Discipline”) of disciplinary action may be: • Four staff members requested a re- the Staff Rules and Regulations serves to view of the decision to qualify their report on: • a warning; performance as “fair” for the refer- • a reprimand; ence year 2016. • requests for review; • suspension without remuneration or • internal appeals; pay for a period not exceeding six Internal reviews were carried out by the • complaints before the Administrative months; Human Resources Department, follow- Tribunal of the International Labour • downward adjustment of the staff ing which the Director-General decided to Organization (ILOAT); and member's salary; maintain the decisions. • cases in which disciplinary action • demotion; • dismissal. was taken. Internal appeals:

The Director-General shall consult the Requests for review and internal ap- From 1 January to 31 December 2017, six- Joint Advisory Disciplinary Board (JADB) peals teen internal appeals were examined by prior to taking any disciplinary action other the Joint Advisory Appeals Board (JAAB). than a warning or a reprimand (Article S Under Article S VI 1.01 of the Staff Rules, VI 2.04 of the Staff Rules) or summary dis- members of the personnel may challenge missal for particularly serious misconduct • Between 2016 and 2017, 14 internal an administrative decision by the Director- (Article S VI 2.05 of the Staff Rules). In the appeals were submitted against the General where it adversely affects the con- latter situation, the Director-General may decisions taken by Council in 2015 ditions of employment or association that decide to dismiss without notice and with- as a result of the five-yearly review derive from their contract or from the Staff out consulting the JADB. of financial and social conditions. All Rules and Regulations. 14 appeals challenged the decision to modify the career structure and Complaints before the Administrative If permitted by the Staff Rules and salary grid and the corresponding in- Tribunal of the International Labour Regulations, a decision may be challenged dividual notifications. In addition, two Organization (ILOAT) internally within the Organization: out of these 14 appeals challenged the decision not to increase the level A decision may be challenged externally by • through a review procedure; or of salaries in January 2016. filing a complaint before the ILOAT: • through an internal appeal proce- dure. In this case, the Joint Advisory By mutual agreement, a number of Appeals Board (JAAB) shall be con- • when internal procedures have been these appeals were temporarily suspended sulted by the Director-General prior exhausted and the decision is final; pending the outcome of the 2017 MERIT to taking any final decision on the • when an internal challenge is not exercise and the confirmation of bench- merits. permitted by the Staff Rules and mark job titles. Hearings before the JAAB Regulations; or took place between February and March • when the complainant is authorised Disciplinary Action 2018. to proceed directly to the Tribunal.

Under Article S VI 2.01 of the Staff Rules, The Director-General decided to follow the **** the Director-General may take disciplinary JAAB's recommendation to reject the ap- action against members of the personnel peals but to initiate career reviews for a who, whether intentionally or through care- Requests for review: number of the appellants concerned. In lessness, are guilty of a breach of the Staff addition, the JAAB made further general Rules and Regulations. From 1 January to 31 December 2017, observations and suggestions concerning there were four requests for review of the implementation of the new career struc-

5 ture, which will be studied by the Director- tial detriment of fair competition be- Article S VI 2.05 of the Staff Rules and, General. tween potential suppliers. consequently, the contract of association was terminated at the foreseen expiry date • Two staff members introduced inter- The Joint Advisory Disciplinary Board without renewal. This was further to the nal appeals against the decision to (JADB): outcome of a fraud investigation involving qualify their performance as “fair” for repeated theft of fuel from the Organization for personal gain. the reference year 2016. • From 1 January to 31 December 2017, the JADB was convened to In both cases, the Director-General de- examine two cases, both concern- Complaints before the Administrative cided to follow the JAAB's recommendation ing the fraudulent use of a team ac- Tribunal of the International Labour to confirm the Organization's original deci- count: Organization (ILOAT): sion. - one procedure resulted in a decision by In February 2017, a former staff member • One staff member introduced an the Director-General to impose two disci- who is in receipt of a total disability pension appeal against the decision to plinary sanctions upon a staff member: de- filed a complaint with the ILOAT against the discontinue their affiliation to the motion by one grade and downward adjust- decision not to recognise the illness as be- Organization's health insurance ment of salary to the midpoint of the new ing of occupational origin. The Tribunal's scheme beyond the date of termi- grade. ruling is expected in summer 2018. nation of contract, further to the staff member's resignation from the - the other procedure resulted in the The ILOAT ruled in two cases involving the Organization. Director-General's decision not to impose Organization, each of which had been filed any disciplinary sanction against the staff in 2015: The Director-General decided to follow member, following the Board's conclusions the JAAB's recommendationto confirm the that the conduct did not constitute a breach • In a case filed by a former CERN fel- Organization's original decision. of the obligations under the Staff Rules. low whose contract was terminated for serious misconduct, the Tribunal Warnings and reprimands: • Also, the Director-General made ruled in favour of the Organization decisions concerning ongoing dis- and dismissed the complaint. • The other case was filed by a ben- In 2017, the Organization issued three ciplinary proceedings launched in eficiary of the CERN Pension Fund warnings and two reprimands, as follows: 2016 concerning declarations by two staff members under the CERN seeking: Health Insurance Scheme. In both • A warning was issued to a staff cases, following a finding of mis- - recognition of two children who were member for anonymously diffusing conduct by the Board, a downward not previously registered with the Pension information intended to undermine salary adjustment of 4% of the mid- Fund and in respect of whose parentage a colleague's professional integrity point grade was imposed and the there was ongoing litigation; and unnecessarily surveying a col- staff members were requested to re- league's work. imburse the fund. • A warning was issued to a staff - confirmation that the beneficiary's current member for inappropriate and unpro- spouse (the marriage to whom had taken fessional behaviour towards a col- Dismissal notified during the probation place after retirement) would be entitled league and demonstrating a lack period: to receive a surviving spouse's pension, of hierarchical and professional re- notwithstanding the legislation in place. sponsibility. In 2017, one staff member was notified of • A warning was issued to a staff the termination of their employment con- The Tribunal upheld the position of the member for inappropriate behaviour tract due to insufficient performance dur- Organization. It determined that, with re- at the workplace and making dis- ing the probation period (as per Article gard to the children, the request was ir- tasteful jokes in front of colleagues. S II 5.01 g of the Staff Rules). receivable as a final decision could not be • A reprimand was issued to a User for taken by the Fund on the basis of disputed the unauthorized use of CERN fuel. Particularly serious misconduct: documentation. It dismissed the claims re- • A reprimand was issued to a staff garding the spouse. member for directing orders to a lim- In 2017, a User's behaviour was deemed ited number of suppliers and con- particularly serious misconduct as per HR Department cealing quotes resulting in the poten-

6 Announcements

BECOME A VOLUNTEER FOR RESEARCHERS' NIGHT AT CERN!

Robotic and cloud chambers workshops, Important information: SC tours, virtual reality headsets, physics shows and demonstrations from CERN ex- • Schedules: there are two shifts or- periences, everything is planned to put on ganised, one from 4:30 p.m. to 8:15 quite a show! At the Globe, enjoy a se- p.m., the other from 7:45 p.m. to lection of the latest science movies, among 11:30 p.m. which the latest film on CERN, “Almost • Conditions: regardless of your sta- Nothing: CERN Experimental City”, an tus, each shift will be rewarded at the award winner at the last Nyon Visions same price as 1 hour of guiding. du Réel film festival. Director Anna de • Languages: fluency in French is Manincor will be present to share her ex- recommended in view of the local perience and answer all questions. community expected at the event. Image: Massarotti, Loraine/CERN English or any other language is def- To run this major event, CERN need initely a plus. On Friday, 28 September 2018 CERN help to welcome, inform, guide and spoil • Briefing sessions: you must attend organises Researchers' Night for the its visitors! Do you want to repre- one of the volunteer briefing ses- 9thconsecutive year! The brand new sent CERN at this event? Become sions before Researchers' Night (Fri Esplanade des Particules, the Globe of a volunteer by filling this form: 21.09 10:00-11:00 a.m. or Tue 25.09 Science and Innovation and Building 33 will https://indico.cern.ch/event/751881/ ! from 4:00-5:00 p.m.) open their doors to the public for this great European celebration of science. A myriad You do not need to be a scientist. The ideal Join Researchers' Night team and make of free and bilingual activities will be avail- profile is someone from CERN with a good this night unforgettable! able from 5 p.m. to 11 p.m. dose of enthusiasm and good mood.

LAUNCH OF THE NEW CERN LEARNING HUB

The new Learning Hub provides a new look Monday, 10 September to continue access- and feel and is a one-stop shop for CERN's ing and enrolling in courses. entire range of courses (including online learning). It includes news to inform you of Between Wednesday, 5 September at what's new and why, and a range of other 4 p.m. and Monday, 10 September, new features designed to improve your ex- please contact [email protected] if perience as a learner. you need to follow an online safety course in order to obtain some access rights. The new Learning Hub will be ac- cessible as of 10 September on WARNING: For technical reasons, any CERN provides a wide range of learning https://learninghub.cern.ch. EDH training requests pending signature and development opportunities for person- after 4 p.m. on Wednesday, 5 September nel. These cover everything from the ev- IMPORTANT INFORMATION : will be cancelled and you will need to re- eryday essentials of safety and computer submit your request. Please ensure that security, through leadership and communi- your requests are signed as soon as possi- cation training to the most arcane technical Access to CTA and SIR will cease at 4 p.m. ble. skills required in a laboratory as large and on Wednesday, 5 September. You will complex as CERN. be able to log in to the Learning Hub on

7 Obituaries

FRANCIS FARLEY (1920-2018)

of the experiments. The first experiment This work continued through his retirement, was performed on the initiative of Leon in parallel to the work on g-2. In this area Lederman, a CERN visitor at the time, too he established a formidable reputation, at CERN's first accelerator, the 600 MeV with many papers written and patents pro- Synchrocyclotron (the remains of which duced over a period of 40 years. Indeed, are housed in Building 300 just inside Gate his most recent paper on wave energy was B). The other members of the noteworthy published just a few days after his death. team on this experiment were, in alpha- betical order: Georges Charpak, Richard Early in his retirement, he designed the Garwin, Theo Muller, Johannes Sens and beam transport for a proton therapy sys- Antonio Zichichi! By the time of the second tem at a cancer hospital, which was still The first g-2 team, from left to right: Francis Farley, experiment, the CERN PS was operating being used more than 20 years later. He Johannes Cornelius Sens, Georges Charpak, Théo and the second and third experiments were later published a special-relativistic single Müller, and Antonino Zichichi (Image: CERN) performed there – taking advantage of the parameter analysis of data on redshifts of higher energy available. Francis type 1A supernovae that showed no evi- alone continued on these experiments, but dence for acceleration or deceleration ef- Friends and colleagues of Francis Farley among others joining the team was Emilio fects (arXiv:0901.3854v3). Even more re- have been deeply saddened to hear that, Picasso. Later Francis, again alone, con- cently he worked on other tests of relativity after a short illness, he passed away on 16 tinued as a member of the most recently based on analysis of the g-2 experi- July at his home in the south of France, at completed g-2 experiment at BNL. ments. the age of 97. Within the community he is particularly associated The first experiment showed that the muon He received many honours: in particular he with the measurement of the muon g-2 but was a 'heavy electron', the second vali- was made a Fellow of the Royal Society his career was in fact much broader than dated electron loops in the photon prop- and was awarded their Hughes Medal for this. agator, the third showed the contribution his work at CERN on g-2. from virtual hadron loops. Each measure- He joined CERN in 1957 and started his ment spurred theoretical physicists to in- Outside of work, he had a passion for flying long and remarkable journey on experi- clude more and more effects in their cal- gliders, was a keen skier, windsurfer and a ments to measure g-2. This journey would culations: higher order corrections in QED, regular swimmer, and liked large American span nearly five decades and four major first order and then higher order hadronic cars. All of these befitted a hardworking experiments, three at CERN and one at and electroweak contributions. The ad- but somewhat playboy image, which years BNL. The initial result from the first experi- vances in the theoretical prediction justi- later formed much of the basis of his novel ment had an accuracy of just 2%, whereas fied in turn the next generation of experi- 'Catalysed Fusion'. the final result from the last experiment ment to give an even more stringent test reached 0.5 parts per million. Each exper- of theory. The storage rings also provided iment was at the time seen as a tour de tests of relativistic time dilation, with the He was a wonderful source of new ideas force and the value measured an important third experiment achieving an accuracy of and insights, with a prodigious output. restraint on the fantasies of theorists. It is 0.1% for a 'muon clock' moving at a speed He was always enthusiastic and could be also striking that each new measurement of 0.9994c and the most accurate test of charming, but was forceful and a stickler for was within the error limits of the previous the 'Twin paradox'. precision. ones. In 1967, he moved back to the UK, taking We have lost one of the heroes of CERN's Many others, including many highly up the post of Dean of The Royal Military early years. renowned physicists, contributed to this College of Science, but continued on g-2 long effort, but he is the sole common au- as a CERN user. In the 1970s, he also His friends and colleagues thor, making seminal contributions to all started to do research on wave energy.

8 BARBARA STRASSER (1954-2018)

Sad news for the CERN Accelerator School Our sincere condolences go to her hus- team. band Georges, their children and family.

Barbara Strasser joined CERN in The CAS and the ATS Support to Project December 1978 and worked for the CERN Office teams Accelerator School (CAS) throughout her career at the Laboratory. Initially she ______worked part-time for the school alongside Suzanne von Wartburg and later became We deeply regret to announce the death solely responsible for all CAS administra- of Barbara Strasser on 6 July 2018. tive matters. During her career, she worked with all the directors of the CAS and could recall many details of past courses includ- Barbara Strasser, who was born on 10 ing the names of former students. During December 1954, worked in the ATS Sector dinner discussions she referred to herself and first came to CERN on 1 December as “the last CAS dinosaur”. 1978.

Her professionalism and the way in which The Director-General has sent a message she made it her business to take care of ev- of condolence to her family on behalf of the eryone's well-being will be fondly remem- CERN personnel. bered by her colleagues at CERN, as well as by the many lecturers and hundreds of Social Affairs students that have been involved in the var- Human Resources department ious courses over the years.

Ombud’s corner

DIG DEEPER TO FIND THE REAL REASONS FOR CONFLICT

Rebecca*is a programmer known for her ready to move on to the next. With her litical dimension, which is a new factor for sense of initiative and dynamism. She initiatives, Rebecca runs the risk of cut- him. has just started working on a highly visible ting corners and damaging the credibility project, the development of a new applica- of the project.” In speaking to Rebecca Fortunately, after my meetings with tion that will be used across the whole of and Laurent, I realised that their expec- Rebecca and Laurent, they spoke to each CERN. She comes to see me because she tations were different, but not incompati- other and were able to smooth things over. feels her true worth isn't being recognised: ble. Rebecca wants to work on tasks that “Laurent* checks my work constantly and are commensurate with her skills. She When you find yourself in conflict with keeps me away from the crucial activities needs a certain amount of autonomy. For someone, ask yourself what might explain of the project. I was expecting a new chal- his part, Laurent feels he can't let anyone the other person's position and try to un- lenge but now I find myself sidelined do- put a foot wrong, as his project is being derstand their deeper motivations. An ing boring and subordinate tasks. I need to watched closely by all the users of the ap- obvious explanation might be concealing contact stakeholders in other departments plication. Moreover, even though he's a something deeper, and if you can identify in order to progress the project, but he pre- seasoned IT professional, his experience it, you might just find the key to resolving vents me from doing so. I also feel that my in the field covered by the application is the conflict. If you can't do it alone, ask for voice should be heard at meetings.” limited. He needs to reassure himself by help, for example by contacting the Ombud. checking Rebecca's work every step of the Rebecca asks me to have a word with way. Pierre Gildemyn Laurent, since she hasn't been able to get the message through to him. A few days But a number of personal issues also lie later, Laurent explains his side of the story: just below the surface. For Rebecca, this If you'd like to comment on any of my ar- “Rebecca is a highly competent program- project is a golden opportunity to make a ticles or suggest a topic that I could write mer, but she wants to go too fast. This name for herself. Laurent, on the other about, please don't hesitate to e-mail me project is very sensitive and has many de- hand, must defend his reputation as a at [email protected]. tractors. So I have to take things one step project leader. This project also has a po- at a time, ensuring at each stage that we're * Names have been changed 9