Combining TIGRESS with charged- particle detection at ISAC-II Fred Sarazin Matt Porter-Peden Luke Erikson Colorado School of Mines

TRIUMF

Predicted Measured (Courtesy: Bob Laxdal / Gordon Ball – TRIUMF)

TIGRESS TRIUMF-ISAC Gamma-Ray Escape-Suppressed Spectrometer 12 HPGe clovers array with BGO shields, each clover made of four ~40% n-type HPGe crystals close-packed. 32-fold segmentation of the outer contacts provide position resolution.

A compact Si array Charged-particle tagging for Coulex/Transfer Charged-particle tagging for Coulex/Transfer –Channel selection, either basic or advanced –Energy levels obtained from  -ray measurements in coincidence. GANIL

Example: 11 Be(d,p) 12 Be* Be Courtesy: Ritu Kanungo, TRIUMF

Vamos+Exogam GATE ON GAMMA COINCIDENCE REMOVES GROUND STATE Geant4 Simulation Requiring Vamos FP Plastic 24 Ne(d,p) 25 Ne Simulation is not the real thing, but… TIARA Courtesy: Wilton Catford, Surrey

Designing the silicon barrel with Geant4 Phase 1: Charged-particle Array (TIARA-like design): Charged-particle Array (TIARA-like design): –Octagonal Barrel  8 silicon strip detectors (Pads)  Each silicon strip detector: 8 resistive strips  Two “layers”: DE (300  m) & E (1mm)  Identification –Forward/Backward detectors  LEDA detectors – 300  m  Other detectors: CDs, TIARA- type annular detectors, … Requirement:  ≤2º &  ≤ 5º

Guelph Workshop – March’05 Funded through Univ. York (UK) Funded through Univ. York (UK) Resistive Strips VS DSSSDs? Resistive Strips VS DSSSDs? –Electronics [CFI grant, R.Austin] –Need to reduce costs  “Double barrel” Configuration with DSSSDs with DSSSDs Coulex Transfer Reactions Phase 2: PCB Target holder Transfer: Coulex:

CSM Workshop – Feb’06 (I) Where to put the PCB, connectors, etc…? Where to put the PCB, connectors, etc…? Phase 2b:

CSM Workshop – Feb’06 (II) Barrel  Box Barrel  Box –Larger  Front  E-E Front  E-E –160  m  E –1.5mm E Highly segmented Highly segmented –DSSSD: 24+48=72 –Barrel: 592 –CD: 160 –Total: 752 channels Phase 3:

Angular resolution Requirement:  ≤2º &  ≤5º Average:  =1.6º &  =3.5º

Sample Sims – A MeV Kinematics Angular Distribution Forward box  E-E

Chamber design TIGRESS front lampshade open TIGRESS front lampshade open  Space available Clockwise/Anticlockwise spirals Clockwise/Anticlockwise spirals  Cable paths Bambino Chamber – LLNL/Rochester Very preliminary design

0º detector while waiting for EMMA? Rationale: Rationale: –No  E-E backward hemisphere –How to get rid of fusion-evaporation contribution? Solution: Solution: –beamlike recoil 0º TIARA Without 0º detectionWith 0º detection (VAMOS) (Courtesy: Wilton Catford)