1. The ISOLDE Solenoidal Spectrometer project
Robert Page

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

3. Physics Motivation

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

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

6. Internal Spectrometer
Plan to exploit Si detector system on

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

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

10. Magnet in Wesley Hospital, Brisbane, September 2015

11. 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

12. Magnet leaving Brisbane hospital February 2016

13. sailing across the globe…
Calicanto Bridge

14. sailing across the globe…
Sarah

15. & arriving at CERN, April 2016

16. Preparation & cleaning
magnet bore ~90 cm diameter

17. Vacuum test

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

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

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

21. on its stand, aligned & connected

22. Stray field

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

24. ISS inside the magnet
beam

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

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

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

28. 132Sn(d,p) with TSR beam quality
simulations by Marc Labiche

29. PCBs

30. PCB trial assembly

31. Si tube cross section

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

33. 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

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