The Global Vision of Professor Hiromi Hirabayashi for Applied ... Professor Hiromi Hirabayashi for...

download The Global Vision of Professor Hiromi Hirabayashi for Applied ... Professor Hiromi Hirabayashi for Applied

of 38

  • date post

    09-Mar-2020
  • Category

    Documents

  • view

    0
  • download

    0

Embed Size (px)

Transcript of The Global Vision of Professor Hiromi Hirabayashi for Applied ... Professor Hiromi Hirabayashi for...

  • The Global Vision of The Global Vision of Professor Hiromi Professor Hiromi HirabayashiHirabayashi for Applied Superconductivity for Applied Superconductivity

    and Cryogenic Engineeringand Cryogenic Engineering

    Thomas M. TaylorThomas M. Taylor CERNCERN

  • T. M. Taylor 2009T. M. Taylor 2009--0404--09 09 22

    Thanks go to

    T. Shintomi, K.Tsuchya, A. Yamamoto

    for providing valuable information (but if there are errors, I take full responsibility!)

    I have surely left out some items – please forgive serious omissions. For the less serious ones my excuse is that there is so much material, and not time to refer to everything…

  • T. M. Taylor 2009T. M. Taylor 2009--0404--09 09 33

    It started 40 years agoIt started 40 years ago……

    The first major application The first major application of superconductivity in the of superconductivity in the realm of high energy realm of high energy physics was for the large physics was for the large spectrometer magnets spectrometer magnets required for determining required for determining the momentum of charged the momentum of charged particles particles

  • T. M. Taylor 2009T. M. Taylor 2009--0404--09 09 44

    ExampleExample:: BEBCBEBC

    Big European Bubble Chamber Magnet

    1967-73

  • T. M. Taylor 2009T. M. Taylor 2009--0404--09 09 55

    First stepsFirst steps

    in the 1970s, As a bubble in the 1970s, As a bubble chamber scientist at KEK chamber scientist at KEK Professor Hiromi Professor Hiromi HirabayashiHirabayashi, , like some other farlike some other far--sighted sighted persons in other laboratories, persons in other laboratories, became aware of the importance became aware of the importance of superconducting technology of superconducting technology for the whole field of high energy for the whole field of high energy physics physics –– not only for analyzing not only for analyzing magnets in experiments but also magnets in experiments but also for guiding and focusing the for guiding and focusing the particle beams in accelerators. particle beams in accelerators.

  • T. M. Taylor 2009T. M. Taylor 2009--0404--09 09 66

    Build for real Build for real

    He started by building a model He started by building a model solenoid for the 1solenoid for the 1--m bubble m bubble chamber. He therefore went on chamber. He therefore went on to build, to build, with the help of with the help of colleagues present here todaycolleagues present here today, , large aperture superconducting large aperture superconducting dipoles and quadrupoles for the dipoles and quadrupoles for the ππ1 beam line.1 beam line. Important step: build for Important step: build for operation in an accelerator to operation in an accelerator to demonstrate to sceptics the demonstrate to sceptics the –– UtilityUtility –– ReliabilityReliability

    Of superconducting technologyOf superconducting technology

  • T. M. Taylor 2009T. M. Taylor 2009--0404--09 09 77

    Large aperture dipole Large aperture dipole for for ππ1 beam line 1 beam line (1977(1977--80)80)

    Size: length 1.38 m, bore 270 mmSize: length 1.38 m, bore 270 mm Field: 4 TField: 4 T Excitation current: 3518 AExcitation current: 3518 A Stored energy: 615 kJStored energy: 615 kJ Cold mass: 10 tCold mass: 10 t Conductor: 35 strand compacted cable Conductor: 35 strand compacted cable NbNb--Ti/CuTi/Cu

  • T. M. Taylor 2009T. M. Taylor 2009--0404--09 09 88

    The Early 80sThe Early 80s

    This was the time that the This was the time that the TevatronTevatron was being was being constructed at constructed at FermilabFermilab, and , and Professor Professor HirabayashiHirabayashi recognized that the technology recognized that the technology would also be important in the would also be important in the long term for KEK so he long term for KEK so he worked with the Cryogenics worked with the Cryogenics CenterCenter and the Mechanical and the Mechanical Engineering department to Engineering department to provide the laboratory with a provide the laboratory with a CenterCenter of expertise in of expertise in cryogenic engineering and cryogenic engineering and applied superconductivity. applied superconductivity.

  • T. M. Taylor 2009T. M. Taylor 2009--0404--09 09 99

    A global visionA global vision

    Being relatively small and not Being relatively small and not having the resources of having the resources of laboratories such as laboratories such as FermilabFermilab, , BNL, and CERN, Professor BNL, and CERN, Professor HirabayashiHirabayashi recognized from recognized from the outset that in order to be the outset that in order to be viable the group would have to viable the group would have to get involved in projects both get involved in projects both inside and outside KEK, and inside and outside KEK, and would have to continue to earn would have to continue to earn worldworld--wide recognition through wide recognition through making timely and quality making timely and quality contributions to the science.contributions to the science.

  • T. M. Taylor 2009T. M. Taylor 2009--0404--09 09 1010

    A global vision A global vision continuedcontinued To be correct, this global approach To be correct, this global approach was the attitude fostered by ICFA was the attitude fostered by ICFA (International Committee for Future (International Committee for Future Accelerators), which recognized that Accelerators), which recognized that world resources should be pooled to world resources should be pooled to make the big new machines, and make the big new machines, and enacted guidelines to encourage enacted guidelines to encourage scientists (and funding agencies) to scientists (and funding agencies) to cooperate.cooperate.

    The exchange of scientists and The exchange of scientists and information that had begun in the information that had begun in the 1970s was further developed.1970s was further developed.

    At the time sense of optimism At the time sense of optimism reigned. LEP and the reigned. LEP and the TevatronTevatron were were being built and the SSC and SLC being built and the SSC and SLC were planned. Superconducting were planned. Superconducting magnet technology was being magnet technology was being mastered.mastered.

  • T. M. Taylor 2009T. M. Taylor 2009--0404--09 09 1111

    Strategy to earn Strategy to earn recognitionrecognition

    To maintain recognition of To maintain recognition of KEKKEK’’ss place place in the superconducting magnet in the superconducting magnet community, Professor community, Professor HirabayashiHirabayashi determined to build magnets that determined to build magnets that create the highest possible fields, create the highest possible fields, requiring to address the main requiring to address the main problemsproblems –– strong forces due fields strong forces due fields –– choice of suitable conductors. choice of suitable conductors.

    This expertise enabled him, together This expertise enabled him, together with his small team, to secure with his small team, to secure participation in the R&D program for participation in the R&D program for the SSC dipole magnet, and to guide the SSC dipole magnet, and to guide and encourage the manufacturers of and encourage the manufacturers of superconducting wire and cables in superconducting wire and cables in Japan to develop material of the Japan to develop material of the required quality. required quality.

  • T. M. Taylor 2009T. M. Taylor 2009--0404--09 09 1212

    Tristan test dipoleTristan test dipole

    (MT-7 Karlsruhe 1981)

  • T. M. Taylor 2009T. M. Taylor 2009--0404--09 09 1313

    KEK 10 T dipole modelKEK 10 T dipole model

    WindowWindow--frame typeframe type Pressurized Pressurized superfluidsuperfluid coolingcooling

    (PAC(PAC--1983 Santa Fe)1983 Santa Fe)

  • T. M. Taylor 2009T. M. Taylor 2009--0404--09 09 1414

    KEK SSC dipole modelKEK SSC dipole model

    Designed, built, tested Designed, built, tested Seven quenches to SS Seven quenches to SS

    (ASC(ASC--1990 Snowmass)1990 Snowmass)

  • T. M. Taylor 2009T. M. Taylor 2009--0404--09 09 1515

    High Field Magnets and High Field Magnets and A15 Superconductors A15 Superconductors

    In addition to the direct In addition to the direct application of tried technology to application of tried technology to an operating system, and the an operating system, and the R&D for making a 10 T dipole, R&D for making a 10 T dipole, specific work was done on specific work was done on conductors:conductors: –– To maximize the keystone angle in To maximize the keystone angle in

    Rutherford cableRutherford cable –– Use of Use of NbNb--Ti with 1.8 K HeTi with 1.8 K He –– A15 conductors were also studied. A15 conductors were also studied.

    Interest in Nb3AlInterest in Nb3Al……

    See invited talk at MTSee invited talk at MT--8 8 ((GrenobleGrenoble, 1983), 1983)

    ““Present status of A15 compoundsPresent status of A15 compounds””

  • T. M. Taylor 2009T. M. Taylor 2009--0404--09 09 1616

    ICFAICFA

    In May 1984 an important In May 1984 an important ICFA seminar was held at KEKICFA seminar was held at KEK This was attended by Giorgio This was attended by Giorgio BriantiBrianti, representative from , representati