Physics Cases Summary Matt Amthor Bucknell University ReA12 Recoil Separator Workshop – July 12, 2014.

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Presentation transcript:

Physics Cases Summary Matt Amthor Bucknell University ReA12 Recoil Separator Workshop – July 12, 2014

Timeline of physics cases  August 2013 Low Energy Community Meeting, MSU  Recoil separator satellite workshop  Recoil separator working group meeting  Goal: to select a preferred separator system  Conclusions:  Physics cases must come first: details, not just concepts  Many experiments need a larger mass resolving power than a gas-filled option can provide (keep gas-filled-mode concept)  Solicitation and collection of physics cases from the community after August and again in Spring 2014  17 physics cases collected  “Evaluated” by working group conveners to determine unidentified experimental parameters ( →spreadsheet). 12 July 2014ReA12 Recoil Separator Workshop, East Lansing2

Community interest questionnaire 12 July 2014ReA12 Recoil Separator Workshop, East Lansing3

12 July 2014ReA12 Recoil Separator Workshop, East Lansing4 Exotic p-rich structure Pairing correlation Precise EM transitions Non-local Cases: H/He gas jet target for astrophysics beyond SECAR (d,p) surrogate reactions for astrophysics and stewardship (light to Uranium) Fusion barrier distribution from CN spin distribution Collectivity in rare isotopes from level lifetimes, γ-spec. (d,n) for nuc. astrophysics p-rich (p,γ) rates, A>50 n-rich shell evolution nn-correlations toward the dripline Heavy n-rich structure and production by MNT Heavy ion fusion to n-rich SHE Decay of heavy n-rich nuclei for r-process Cross-shell excitations in p isotopes Deep inelastic gamma spec of n-rich Physics Cases – Landscape incl. most of the NSAC RIB TF Benchmarks 2007 NSAC RIB Taskforce Benchmarks: 1 Shell Structure 2 Superheavies 4 Pairing 5 Symmetries 13 Limits of Stability 15 Mass Surface 7 r-Process 16 rp-Process 11 Stewardship science

Why such diversity? 12 July 2014ReA12 Recoil Separator Workshop, East Lansing5

Physics Cases Auxiliary Systems 12 July 2014ReA12 Recoil Separator Workshop, East Lansing6  Target area  GRET(IN)A, CAESAR, SuN, HAGRiD  ORRUBA  HELIOS (proposed?)  Plunger  LENDA, VANDLE  Gas jet target  Focal plane  TOF, dE, TKE, (tracking)  Implantation decay, multiple channels: α, β, γ, n, fission.

Recoil Separator Needs 12 July 2014ReA12 Recoil Separator Workshop, East Lansing7  Space about the target for detection, targets, swinger, etc.  Achromatic image (small FP) for implantation → decay  Bρ max = 2.5 Tm (for gas-filled mode)  Eρ max = 105 MV (median 42 MV)  Swinger for incoming beam angles up to 5o degrees  M/Q resolving power up to 1000 (most )  Q and Bρ acceptance +/-10% (larger helps for some)  Angular Acceptance +/-170 mrad (most +/ mrad)  Physical M/Q separation: one yes (most no or don’t specify)  Bunch size/spacing: 200ps/80ns (most don’t specify) See the Physics Cases Spreadsheet for details by proposal.

Questions? Next – ISLA and SUPERB 12 July 20148