The ISOLDE Solenoidal Spectrometer project Robert Page Spectrometer

The ISOLDE Solenoidal Spectrometer project Robert Page

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

Physics Motivation

Solenoidal spectrometer concept vlab θlab Vcm CM Energy: CM Angle: v 0 θcm z

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

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

Spectrometer Systems for TSR@ISOLDE Challenges: TSR not in CERN MTP ISS on XT 02 beam line No TSR –beam quality )beam manipulation( No funding for magnet

Magnet procurement • Magnet available from Brisbane (UQ) • • OR 66 4 T ex-MRI magnet “Active shield” reduces stray field Installed February 2003 Discharged then warmed ~2013 • Funding request (STFC/Uo. L) June 2015

Magnet in Wesley Hospital, Brisbane, September 2015

Magnet procurement • Magnet available from Brisbane (UQ) • • OR 66 4 T ex-MRI magnet “Active shield” reduces stray field Installed February 2003 Discharged then warmed ~2013 • Funding request (STFC/Uo. L) June 2015 • Magnet ordered November 2015

Magnet leaving Brisbane hospital February 2016

sailing across the globe… Calicanto Bridge

sailing across the globe… Sarah

& arriving at CERN, April 2016

Preparation & cleaning magnet bore ~90 cm diameter

Vacuum test

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

Energising, February 2017 ramped up to 2. 75 T, held for 1 hour then ramped down

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

on its stand, aligned & connected

Stray field

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

ISS inside the magnet beam

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

ISS Si detector module 6 R 3 B ASICs 0 – 50 Me. V 128 channels 100 MHz time stamp daisy-chained

Si detectors DSSDs: 1 mm thick x: 128 × 0. 95 mm y: 11 × 2 mm

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

PCBs

PCB trial assembly

Si tube cross section

Reconstructing the z position CM Energy: Algorithm devised by P. Butler Implemented in GEANT 4 by M. Labiche

Exploitation plans early exploitation before LS 2 stable & long-lived isotope running during LS 2 + commissioning of the ISS Si array + commissioning of gas recoil detector… followed by ISS running after LS 2

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