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CERN Courier – Digital Edition Welcome to the Digital Edition of the March 2018 Issue of CERN Courier I NTERNATIONAL J OURNAL OF H IGH -E NERGY P HYSICS CERNCOURIER WLCOMEE V OLUME 5 8 N UMBER 2 M ARCH 2 0 1 8 CERN Courier – digital edition Welcome to the digital edition of the March 2018 issue of CERN Courier. Illuminating antimatter The humble hydrogen atom has taught us much during the past two centuries, ultimately leading to the atomic picture of Bohr. As this month’s cover feature argues, physicists are morally obligated to subject anti-hydrogen to the same analytical tools – in particular to test if antimatter obeys the same fundamental symmetries as matter. Following a long campaign, the ALPHA collaboration at CERN’s Antiproton Decelerator (AD) has recently measured the antihydrogen 1S–2S transition and other spectral properties of antihydrogen, opening a new direction of exploration. Meanwhile, the AD’s BASE experiment has measured the antiproton magnetic moment with exquisite precision, further testing symmetries such as CPT. We also describe a Cornell-Brookhaven project to build the first superconducting multi-turn energy recovery linac, survey the latest attempts to test the validity of the Pauli exclusion principle, and report on an initiative to establish a world-class research infrastructure in South-East Europe following the CERN model. To sign up to the new-issue alert, please visit: cerncourier.com/cws/sign-up. To subscribe to the magazine, the e-mail new-issue alert, please visit: cerncourier.com/cws/how-to-subscribe. EDITOR: MATTHEW CHALMERS, CERN Pauli principle on trial • Energy-saving accelerators • Science for peace DIGITAL EDITION CREATED BY DESIGN STUDIO/IOP PUBLISHING, UK CCMar18_Cover_v4.indd 1 08/02/2018 11:25 CERNCOURIER WWW. V OLUME 5 8 N UMBER 2 M ARCH 2 0 1 8 CERN Courier March 2018 Contents Covering current developments in high-energy physics and related fields worldwide CERN Courier is distributed to member-state governments, institutes and laboratories affiliated with CERN, and to their personnel. It is published monthly, except for CERNCOURIER January and August. The views expressed are not necessarily those of the CERN management. Editor Matthew Chalmers V OLUME 5 8 N UMBER 2 M ARCH 2 0 1 8 Books editor Virginia Greco CERN, 1211 Geneva 23, Switzerland E-mail [email protected] Fax +41 (0) 22 76 69070 5 V IEWPOINT Web cerncourier.com Peter Jenni, Christine Sutton, Claude Amsler, Advisory board 7 N EWS Philippe Bloch, Roger Forty, Mike Lamont, Matthew Mccullough Europe defines astroparticle strategy Neutrons cooled Laboratory correspondents: • • Argonne National Laboratory (US) Tom LeCompte for interrogation Lithuania formalises CERN membership Brookhaven National Laboratory (US) Achim Franz • Cornell University (US) D G Cassel • LHC prepares for final year of Run 2• Rare hyperon-decay DESY Laboratory (Germany) Till Mundzeck anomaly under the spotlight First light for ExTrA EMFCSC (Italy) Anna Cavallini • Enrico Fermi Centre (Italy) Guido Piragino ATLAS measures rare top plus boson production Fermi National Accelerator Laboratory (US) Katie Yurkewicz • Forschungszentrum Jülich (Germany) Markus Buescher CMS hunts for heavy neutral leptons ALICE investigates GSI Darmstadt (Germany) I Peter • • IHEP, Beijing (China) Lijun Guo charm-quark hadronisation IHEP, Serpukhov (Russia) Yu Ryabov INFN (Italy) Antonella Varaschin Jefferson Laboratory (US) Kandice Carter 15 S CIENCEWATCH JINR Dubna (Russia) B Starchenko KEK National Laboratory (Japan) Saeko Okada Lawrence Berkeley Laboratory (US) Spencer Klein 17 A STROWATCH Los Alamos National Laboratory (US) Rajan Gupta NCSL (US) Ken Kingery Nikhef (Netherlands) Robert Fleischer F EATURES Novosibirsk Institute (Russia) S Eidelman Orsay Laboratory (France) Anne-Marie Lutz 19 Small accelerator promises big returns PSI Laboratory (Switzerland) P-R Kettle Saclay Laboratory (France) Elisabeth Locci The CBETA multi-turn energy-recovery linac aims to combine the Science and Technology Facilities Council (UK) Jane Binks SLAC National Accelerator Laboratory (US) Melinda Baker best of linear and circular accelerators. TRIUMF Laboratory (Canada) Marcello Pavan Produced for CERN by IOP Publishing Ltd 25 Experiment of the moment IOP Publishing Ltd, Temple Circus, Temple Way, Bristol BS1 6HG, UK The BASE collaboration at CERN has measured the antiproton Tel +44 (0)117 929 7481 magnetic moment with extraordinary precision. Publisher Susan Curtis Production editor Ruth Leopold 30 Illuminating antimatter Technical illustrator Alison Tovey Group advertising manager Chris Thomas ALPHA collaboration reports seminal Advertisement production Katie Graham Marketing & Circulation Angela Gage measurements of antihydrogen’s spectral structure. Head of B2B & Marketing Jo Allen Art director Andrew Giaquinto 35 Putting the Pauli exclusion principle on trial Advertising Tel +44 (0)117 930 1026 (for UK/Europe display advertising) If detected, even the tiniest violation of the exclusion principle or +44 (0)117 930 1164 (for recruitment advertising); E-mail: [email protected]; fax +44 (0)117 930 1178 would revolutionise physics. General distribution Courrier Adressage, CERN, 1211 Geneva 23, Switzerland ACES LACES E-mail: [email protected] 41 F & P In certain countries, to request copies or to make address changes, contact: China Ya'ou Jiang, Institute of High Energy Physics, PO Box 918, Beijing 100049, People’s Republic of China 50 R ECRUITMENT E-mail: [email protected] Germany Antje Brandes, DESY, Notkestr. 85, 22607 Hamburg, Germany E-mail: [email protected] 55 B OOKSHELF UK Sian Giles, Science and Technology Facilities Council, Polaris House, North Star Avenue, Swindon, SN2 1SZ E-mail: [email protected] 58 A RCHIVE US/Canada Published by Cern Courier, 6N246 Willow Drive, St Charles, IL 60175, US. Periodical postage paid in St Charles, IL, US Fax 630 377 1569. E-mail: [email protected] POSTMASTER: send address changes to: Creative Mailing Services, PO Box 1147, St Charles, IL 60174, US Published by European Organization for Nuclear Research, CERN, I NTERNATIONAL J OURNAL OF H IGH -E NERGY P HYSICS 1211 Geneva 23, Switzerland CERNCOURIER Tel +41 (0) 22 767 61 11. Telefax +41 (0) 22 767 65 55 V OLUME 5 8 N UMBER 2 M ARCH 2 0 1 8 Illuminating antimatter Printed by Warners (Midlands) plc, Bourne, Lincolnshire, UK © 2018 CERN ISSN 0304-288X Pauli principle on trial • Energy-saving accelerators • Science for peace On the cover: Artistic illustration of the visible spectrum. 3 CCMar18_Contents_v3.indd 3 08/02/2018 12:25 CERNCOURIER WWW. V OLUME 5 8 N UMBER 2 M ARCH 2 0 1 8 CERN Courier March 2018 9th International Viewpoint Particle Accelerator Conference Shaping science in South-East Europe An international scientific facility following the CERN model would stimulate the region. including ESFRI and the European Commission. Its aim was to present two scientific options for SEEIIST: a fourth-generation synchrotron light The 9th International Particle Accelerator Conference (IPAC’18), will be held in Vancouver, British Columbia, Canada from April 29 to May 4, source that would offer users intense beams from 2018. The venue will be the brand new JW Marriott parq Vancouver hotel which features overlooking views of False Creek, Granville Island, infrared to X-ray wavelengths; and a state-of-the-art and English Bay. IPAC’18 is hosted by TRIUMF, Canada’s National Laboratory for Particle and Nuclear Physics; and is jointly sponsored by patient treatment facility for cancer using protons and Government of Montenegro of Government the NPSS (IEEE) and DPB (APS). Over 1200 delegates and 80 industry exhibits are expected to be in attendance. heavy ions, also with a strong biomedical research programme. The concepts behind each proposal were IPAC is the main international event for the worldwide accelerator community and industry. Attendees will be presented with cutting-edge worked out by two groups of international experts. accelerator research and development results and gain the latest insights into accelerator facilities across the globe. Topical areas to be With SEEIIST’s overarching goal to be a world-class covered include: research infrastructure, the training of scientists, engineers and technicians is essential. Whichever . • Circular and Linear Colliders Delegates at a scientific By Herwig Schopper project is selected, it will require several years of effort, . • Photon Sources and Electron Accelerators forum at the ICTP in during which people will be trained for the operation . • Novel Particle Sources & Acceleration Techniques Trieste in January explored In the autumn of 2016, at a meeting in Dubrovnik, of the machines and user communities will also be . • Hadron Accelerators a new world-class research Croatia, trustees of the World Academy of Art formed. Capacity-building and technology-transfer . • Beam Dynamics and EM Fields infrastructure for and Science discussed a proposal to create a large activities will further trigger developments for the . • Beam Instrumentation, Controls, Feedback and Operational Aspects South-East Europe. international research institute for South-East whole region, such as the development of powerful . • Accelerator Technology Europe. The facility would promote the development digital networks and big-data handling. • Applications of Accelerators, Technology Transfer and Industrial Relations. of science and technology and help mitigate tensions Reports and discussions from the ICTP forum between countries in the region, following the have provided an important basis for the next steps. The Scientific Program will include 55
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