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The ISOLDE Solenoidal Spectrometer project

The ISOLDE Solenoidal Spectrometer project, funded by UK STFC, involves the implementation of Internal and External spectrometers starting from January 2015 with a completion target of March 2019. The project aims to address challenges related to TSR relocation and spectrometer systems at CERN. Magnet procurement, detection system integration, and operational planning play key roles in accomplishing project milestones.

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The ISOLDE Solenoidal Spectrometer project

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  1. The ISOLDE Solenoidal Spectrometer project Robert Page

  2. The original plan: Move TSR to ISOLDE UK STFC funded project ~£5M investment Internal spectrometer External spectrometer Start January 2015 Completion March 2019 Spectrometer Systems for TSR@ISOLDE

  3. Physics Motivation

  4. Solenoidal spectrometer concept vlab v0 θlab θcm z Vcm CM Angle: CM Energy:

  5. Challenges: TSR not in CERN MTP Spectrometer Systems for TSR@ISOLDE

  6. Internal Spectrometer Plan to exploit Si detector system on CRYRING@ESR

  7. Challenges: TSR not in CERN MTP ISS on XT02 beam line No TSR – beam quality (beam manipulation) No funding for magnet Spectrometer Systems for TSR@ISOLDE

  8. Magnet procurement • Magnet available from Brisbane (UQ) • OR66 4T ex-MRI magnet • “Active shield” reduces stray field • Installed February 2003 • Discharged then warmed ~2013 • Funding request (STFC/UoL) June 2015

  9. Magnet in Wesley Hospital, Brisbane, September 2015

  10. Magnet procurement • Magnet available from Brisbane (UQ) • OR66 4T ex-MRI magnet • “Active shield” reduces stray field • Installed February 2003 • Discharged then warmed ~2013 • Funding request (STFC/UoL) June 2015 • Magnet ordered November 2015

  11. Magnet leaving Brisbane hospital February 2016

  12. sailing across the globe… Calicanto Bridge

  13. sailing across the globe… Sarah

  14. & arriving at CERN, April 2016

  15. Preparation & cleaning magnet bore ~90 cm diameter

  16. Vacuum test

  17. Cooling down, January 2017 Thanks to CERN cryogenics team, Patrick Retz, ...

  18. Energising, February 2017 ramped up to 2.75 T, held for 1 hour then ramped down

  19. In the ISOLDE Hall ~18 tons – too heavy for ISOLDE hall crane!

  20. on its stand, aligned & connected

  21. Stray field

  22. Magnetic shielding design Jérémie Bauche, Kevin Buffet & Yacine Kadi (CERN)

  23. ISS inside the magnet beam

  24. ISS Mechanical Design Target & detector drive systems Hexagonal Si tube ~50 cm long 4 DSSDs per face ASIC readout Cooled

  25. ISS Si detector module 6 R3B ASICs 0 – 50 MeV 128 channels 100 MHz time stamp daisy-chained

  26. Si detectors DSSDs: 1 mm thick x: 128 × 0.95 mm y: 11 × 2 mm

  27. 132Sn(d,p) with TSR beam quality simulations by Marc Labiche

  28. PCBs

  29. PCB trial assembly

  30. Si tube cross section

  31. Reconstructing the z position CM Energy: Algorithm devised by P. Butler Implemented in GEANT4 by M. Labiche

  32. Exploitation plans early exploitation before LS2 stable & long-lived isotope running during LS2 + commissioning of the ISS Si array + commissioning of gas recoil detector… followed by ISS running after LS2

  33. Conclusions • Design work well advanced • First Si DSSDs delivered • Prototype tests under way • Magnet recommissioned • ISOLDE integration continuing

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