1. ISOL-SRS project

2. Storage ring at ISOLDE
Beam quality
Luminosity

3. International Collaboration
Eur. Phys. J. Special Topics
207, (2012)
MPI-K Heidelberg: TSR, technical input to install and commission.
CERN: New TSR building and infrastructure (15 MCHF). Research Board approved installation and included on CERN-MTP.
UK: Detector array for internal spectrometer. External (HELIOS-like) spectrometer.
Total project costs awarded, including manpower, is £4.8M (£3.2M “new money” mostly for materials), shared between Daresbury, Liverpool & Edinburgh.
(Includes contingency)
Universities of Aarhus and Lund: In-ring gas-jet target.

4. In-ring DSSD System (Edinburgh-Daresbury) For in-ring (d,p), (p,d) and (3He,d) transfer studies of astrophysical resonances
UHV mounting; 100 x 100 mm; 0.25 – 1mm strips; AIDA-type readout

5. External spectrometer (Liverpool-Daresbury) for high resolution studies of nuclear reactions on heavier nuclei outside the ring
HELIOS concept
1 m uniform field
detector
1m uniform B field
e.g. Q-value = 1.01 Elab (MeV) z (cm)
for 10 MeV/u 132Sn(d,p)
4 x 125 x 25 mm; mm strips; R3B-type readout

6. Q-value resolution EXTERNAL SPECTROMETER: d(24Ne,p)25Ne @ 10 MeV/u
With HIE-ISOLDE beam: 38 keV
With cooled TSR beam: 22 keV
INTERNAL SPECTROMETER: 10 MeV/u
Cooled TSR beam: 29 keV

7. Acceptance and luminosity
Internal: Recirculation advantage for light species; any pure light gas, e.g. helium-3, can be used as target.
External: Generally larger coverage in scattering angle, important for establishing angular distributions.

8. KEY PRIORITY of ISOL-SRS is to develop spectrometer systems for the TSR storage ring to fully exploit the range of radioactive beams from HIE-ISOLDE.

9. MRI magnet: Oxford OR66
4T, ActiveShield technology MRI magnet available (type OR66)
Large bore of up to 90 cm diameter, ~2m long
Magnet comes with power supply, cold-head and compressor, and other equipment and should be operational
Installation requires cool-down (6500 litres of LHe, ramping and shimming (passive and active shimmming)
Specifications:

10. Layout

11. OR66 magnet fringe field
Space allocation for magnet assumed to be 10 x 10m

12. Gantt chart

13. Planning Install at CERN first quarter of 2019
LS (if delayed by 1 year)
Exploitation with direct HIE beams
Exploitation with TSR beams from 2023

14. Re-phrase of D. Jenkin’s ISCC slide
External spectrometer will be deployed in ISOLDE hall
Funding for magnet (~£250k) needs to be found (possibility of capital funding in UK).
Gas-­jet target will be picked up by Scandinavian groups.
Laser spectroscopy aspects to be pursued through consolidated grants
Others welcome to join – bring ancillary detectors etc.

15. Letter from D-G

16. FINIS