GUIDO, FROM THE BEGINNING TO THE ELECTROWEEK STUDIES AT CERN

Transcription

1 GUIDO, FROM THE BEGINNING TO THE ELECTROWEEK STUDIES AT CERN Ugo Amaldi Università Milano Bicocca e Fondazione TERA 1

2 The first accelerator: the electronsynchrotron 1 GeV Frascati - INFN

3 Playing with diamonds Coherent bremsstrahlung from a diamond crystal Grazie al puntiglioso 3

4 1971- The Intersecting Storage Rings 4

5 Crans Discussion on rising cross-sections 5

6 1975: 3 converging proposals : CHARM U. A. : Polarization of muons produced in CDHS by neutrinos G.B.: Scattering of neutrinos on electrons K.W.inter: Structure functions measured with Neutral Currents Calorimeter made of 400 tons of Carrara marble 6

7 One of the modules made of Carrara marble 7

8 The neutrino hall at the SPS CDHS CHARM μ CERN

9 CHARM and its events CC event μ NC event 9

10 Separation between electron and hadron shower CHARM Collab., J. Dorenbosch et al., Z. Phys. C 41 ( 1989 )

11 The Italian Physical Society Conference in Padova 11

12 The Italian Physical Society Conference in Padova Milla Baldo Ceolin 12

13 1978 Meeting of the CHARM collaboration in Rome 13

14 1979: ICFA Workshop on future accelerators Les Diablerets CERN Auditorium Guido reports the results of the WG on future neutrino physics 14

15 The Large Electron Positron collider OPAL DELPHI ALEPH L3 15

16 The first steps of DELPHI September 1980: Guido tells me: Why not proposing an experiment OURSELVES? January 1981: COLLEPS 3 possible designs GROUPS AMSTERDAM BERGEN BOLOGNA CERN EC.POLYTECHNIQUE GENOVA LUND NIJMEGEN ORSAY OSLO UPPSALA ROME SACLAY STOCKHOLM STRASBOURG 16

17 My concluding transparencies with Jim Allaby s writing 21 gennaio

18 Villars Meeting Summer 1981 Herwig Schopper - CERN DG: L of I of no more than 10 pages by January

19 Two contests for name and logo December 1981: DELPHI proposed byg. Myatt 1983: Logo propoproposed by the Padova-Trieste group 19

20 The DELPHI Collaboration January 82: letter of intent Autumn 82: DELPHI after the marriages Guido was member of the Executive Committee 20

21 The first bulletin Provisional approval: May 82 Final approval: Dec. 82 DELPHI specialties: 3-layer microvertex (B. Hyams, P. Weilhammer) 2 Riches (T. Ekelöf, J. Seguinot, T. Ypsilantis) 21

22 Technical proposal: choice of the electromagnetic calorimeter Guido votes against the High-density Projection Chamber HPC BUT after the decision accepts to become the Project Leader 22

23 1983: Technical Proposal DELPHI, the drifting detector 23

24 1983: Guido was also kitchen Project Leader 24

25 The machines to produce the lead accordions were designed by Pietro Negri 25

26 While HPC is built:

27 While HPC is built: 1987 G.Barbiellini and G.Cocconi Electric charge of the neutrinos from SN1987 Nature 329, 21 (1987) 27

28 June 1988: DELPHI is ready for the HPC 28

29 July 1988: an accordion is ready to be mounted 29

30 January 1989: The HPC is almost completed 30

31 January

32 Before and after the insertion of the TPC April 1989 HPC RICH 32

33 First events Guy Wormser: Ugo, we have it! Sunday, October 14 Probability

34 Sunday, December : two jets and two muons a higsson! the great delusion 34

35 July 1996 Science publishes the first WW event DELPHI was last in Z detection but first in WW production 35

36 A beautiful result ready in 1990 TRIPLE GLUON VERTEX DELPHI was first by one year 36

37 LEP results on weak parameters are much better than expected Daniel Treille 37

38 LEP results on weak parameters are much better than expected 38

39 The left-over discrepancies 39

40 Grazie Guido dell amicizia e della passione per la fisica DELPHI Per - UA - Trieste UA 40