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Home , Emil Warburg, Klaus von Klitzing, Walther Bothe, Wilhelm Wien

 Chapter 2 – PTR/PTB: 125 Years of Metrological Research

The “Kuratorium”, PTB’s Advisory Board

Robert Wynands From the very beginning (to be more exact: Table: from 6 August 1887), the Physikalisch-Technische winners in the Kuratorium of the PTR/PTB. Reichsanstalt (Imperial Physical Technical Institute – PTR) had a management tool which, from our in the present-day perspective, was really quite modern: Member Nobel Prize Kuratorium from – to the “Kuratorium” (Advisory Board). Now as then it fulfils – on the one hand – the role of a scien- Wilhelm Conrad Röntgen 1901 1897 – 1920 tific advisory board and represents – on the other Physics 1905 1926 – 1929 hand – the interests of PTB’s customers from the Physics 1911 1912 – 1928 scientific, economic and social sectors. Its task Physics 1914 1949 – 1960 is/was to advise both the PTR/PTB itself as well as Physics 1918 1908 – 1935 its supervisory ministry (in the past: the Reich- Fritz Haber 1918 1920 – 1935 samt des Inneren – Imperial Office of the Interior, Walther Nernst Chemistry 1920 1895 – 1935 today: the Bundesministerium für Wirtschaft und Physics 1921 1916 – 1933 Technologie – Federal Ministry of Economics and Physics 1925 1928 – 1935 Technology) on all issues concerning this institute. Gustav Hertz Physics 1925 1930 – 1935 Especially in important strategic decisions, the Physics 1954 1953 – 1957 Kuratorium can provide important assistance and Physics 1985 1989 – advice thanks to its wide-ranging expertise. Theodor W. Hänsch Physics 2005 1999 – In the PTR, the Kuratorium assumed tasks which it no longer has in PTB today, namely that of proposing the PTR’s budget for the coming year 1960s. Under the name “Josephson junction”, the as well as of approving staff appointments and the contact point of two superconductors divided Picture below: visits of guest scientists. But scientific discussions by a thin, non-superconducting insulating layer Meeting of Nobel Prize winners in Berlin in did not come too short either. In the proceed- became famous and – among other things – serves 1923: Nernst, Einstein, ings of the Kuratoriumssitzung (Advisory Board today for the practical realization of the volt (the Planck, Millikan, von Meeting) of 1926 there is, for example, a passage unit of electric potential difference) with a relative Laue. Apart from Mil- –10 likan, all of them were in which – in a discussion about the PTR’s activity uncertainty of less than 10 . closely connected to the report – one of the members of the Kuratorium, The list of the members of the Kuratorium reads PTR for many years, for Albert Einstein, says on the subject of supercon- like a “who’s who” of science and technology: instance as members of the Kuratorium. ductivity: “What is of particular interest is the in the first twenty years alone, scientists such as question as to whether the contact point between Wilhelm Foerster, Hans Heinrich Landolt, Rudolf Picture right page: two superconductors also becomes superconducting.” Clausius, Friedrich Kohlrausch, Ernst Abbe, PTB’s Kuratorium in 2011 in front of the As far as we know, this question was not followed , Georg Quincke, Emil Warburg and Vieweg Building up at the time, but was taken up again only in the Karl Schwarzschild worked on this board. To date, a total of thir- teen Nobel Prize winners have been members of the Kuratorium of the PTR/PTB – a sign of the high signifi- cance which both sides attribute to this type of advice. The last Kurato- rium meeting of the old PTR took place in 1933. At the beginning of 1935, the Kuratorium was disbanded at the instigation of the then President of the PTR, Johannes

120 The “Kuratorium”, PTB’s Advisory Board 

Stark, and its tasks were transferred to the Presi- ments in construction or major investments made in equipment such as dent in accordance with the National Socialists’ the Willy Wien Laboratory at Berlin Adlershof with the Metrology “Führer” principle. After the Second World War, Source, a synchrotron radiation source specially tailored to the needs of at the end of the 1940s, the institute was re-estab- metrology – in particular, radiometry. lished under the name “Physikalisch-Technische The members of PTB’s Kuratorium are appointed for a five-year Anstalt” (PTA). This institute had a Kuratorium period. Re-appointments are possible. In contrast to the early years, again right from the start. People with illustri- there are no de-facto quotas according to specialist areas today, ous names belonged the board once more, also although care is, of course, taken to cover the whole spectrum of PTB’s including Max von Laue, who had been personally scope and customers when new members are appointed. To identify very engaged in re-founding the institute and had possible new members of the Kuratorium, the board has established had close ties to the old PTR for many years as a the “Committee for the Extension of the Kuratorium” (Ausschuss “Theory Advisor”. zur Ergänzung des Kuratoriums). It meets during the annual board Today, PTB’s Kuratorium consists of approx. meeting and gives advice on extending the appointment of active board 25 outstanding individuals with roughly equal members and suggests new candidates to the ministry. numbers from science and industry. The esteem Looking for suitable candidates for the post of PTB president is and importance attached to PTB’s work also another of the Kuratorium’s important tasks. To accomplish this, the becomes evident by the fact that German indus- Extension Committee – supplemented with other selected individu- try is currently being represented at an equally als – becomes active. The committee obtains an overview of suitable candidates, bearing in mind that the post of president of PTR/PTB demands not only a broad understanding of science – proved, among other things, by outstanding personal scientific achievements – but also excellent management skills. From this group of candidates, one person is selected, presented to the whole Kurato- rium and, on their approval, suggested to the Federal high level to science through the chairperson of Minister of Economics and Technology for appointment. Both the co- Volkswagen AG as well as through other repre- optation process for the new appointment of board members as well as sentatives from the executive level of large and the procedure for finding a new president have very much proved their medium-sized enterprises. Science is represented, worth over the years. for example, with two Nobel Prize winners and the All in all, looking back at the first 125 years of PTR/PTB shows that president of the Helmholtz-Gemeinschaft Deutscher the “Kuratorium” has proved itself to be highly useful and very successful Forschungszentren (). for the interests of the institute. It serves not only as a scientific advisory The Kuratorium meets annually at a two-day board and as an instrument for including the interests of the German meeting at PTB in Braunschweig as well as in economy and of the German consumers, but also acts as a contact and Berlin, in order to gain a clear picture of PTB’s an advisor for the ministry in issues which concern PTB itself and the work through laboratory visits, a scientific col- framework conditions of its work. The Wissenschaftsrat (German Council loquium as well as individual discussions with the of Science and Humanities) also highlighted this role in its comments on staff of the divisions. Besides this, the Kuratorium PTB from 2008 [Wissenschaftsrat, Stellungnahme zur Physikalisch-Techni- receives the report of PTB’s president about the schen Bundesanstalt (PTB), Braunschweig und Berlin, Drs. 8477-08, Rostock, past year and discusses it. During this meeting May 2008]. The success story of the Kuratorium meets equally with large and in various individual meetings over the year, interest from visitors from foreign national metrology institutes and from the Kuratorium provides important impetus for ministries, so that it is to be expected that not only the establishment of a the further orientation of PTB to the interests of national metrology (research) institute such as the then PTR served as an science and the economy in . This applies, example throughout the world – and is indeed still doing so – but also the in particular, to the planning of large-scale invest- establishment of its advisory board, the “Kuratorium”. 

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