1. Fragment Mass Analyzer Darek Seweryniak, ANL C. N. Davids et al., Nucl. Instrum. Meth., B 70, 358 (1992).

2. GRETINA at ATLAS workshop, March 2013 2 GAMMASPHERE+FMA  Resonances in rp-process nuclei  n-rich nuclei A~60  N~Z nuclei  101 Sn  Proton emitters   emitters  Transfermium nuclei  …

3. GRETINA at ATLAS workshop, March 2013 3 GRETINA+FMA Can we extend the GS-FMA reach? Larger FMA solid angle Higher Ge rates? Better Doppler correction (recoil angle and energy) Polarization No dead time Campaign in January 2013 Important step towards GRETA

4. GRETINA at ATLAS workshop, March 2013 4 Argonne Fragment Mass Analyzer Mass resolution:  M/M~1/350 Angular acceptance:  =8 msr(2 msr) Energy acceptance:  E / E =+/-20% M/Q acceptance:  (M/Q)/(M/Q)=10% Flight path 8.2m Max(B  )=1.1Tm Max(E  )=20MV Can be rotated off 0 degrees Can be moved along the axis Different focusing modes Q4 Q3 ED2 ED1 MD Q2 Q1 FP DSSD 40 cm M1 M2 M3

5. GRETINA at ATLAS workshop, March 2013 5 FMA at 293 mm and 900 mm  y,max =0.0401 rad  x,max =0.0495 rad  =7.4 msr  y,max =0.0295 rad  x,max =0.0167 rad  ~1.8 msr

6. GRETINA at ATLAS workshop, March 2013 6 FMA angular acceptance 58 Ni+ 50 Cr at 220 MeV Fraction of accepted recoil 2 msr 8 msr gain alpha+p+2n 0.13 0.47 X3.6 p+2n 0.44 0.93 X2.1 Based on PACE calculations.

7. GRETINA at ATLAS workshop, March 2013 7 Existing focal plane detectors  Parallel Grid Avalanche counter –Very good spatial resolution –Modest rate capability <10 kHz –Fairly thin windows (2X120 micron mylar foils)  Parallel Foil Avalanche counter –Very good spatial resolution –High rate capability (tested to 30 kHz) –More material (two additional foils)  Channel plate detector –Worse spatial resolution –High rate capability (100 kHz) –Very thin  Ionization chamber –Isobutane –200 micron window –3 segments - 5cm+5cm+20cm –Pressure <25 Torr

8. GRETINA at ATLAS workshop, March 2013 8 Micro-channel plate detector  4X12 cm 2 whole focal plane  high rates 100 kHz  good spatial resolution (magnets)  much lower energy loss –better Z resolution –less angular straggling Photonis Inc., USA B. diGiovine

9. GRETINA at ATLAS workshop, March 2013 9 Implantation station Ge clovers 160X160 DSSD Large area Si Si/PiN box plastic  dets Recoil-Decay Tagging (protons,alphas,betas,conversion electros, gamma rays, …)

10. GRETINA at ATLAS workshop, March 2013 10 Implantation station  Suite of DSSDs –48X48, 16X16mm 2 –40X40, 40X40mm 2 –80X80, 32X32mm 2 –160X160, 64X64mm 2, 100  m - protons 140  m - alphas 300  m - beta delayed protons 1000  m - betas  Large area Si veto detector: 5X5cm  Escape detectors –4 SSSD in a box geometry, 7 strips, 4X6cm 2 –PiN diode detector array, 4 2X2 detectors

11. GRETINA at ATLAS workshop, March 2013 11 X-array  5 clover detectors in a box geometry  64x64 mm, 160x160 DSSD  Mobile frame

12. GRETINA at ATLAS workshop, March 2013 12 Trigger and Time control module 100MHz, 14-bit Digitizer M. Cromaz et al., A 597 (2008) 233–237 J.T. Anderson et al., 2007, IEEE Nuclear Science Symposium Conference Record, p. 1751 FMA Digital DAQ based on GRETINA, developed in parallel with DGS  Trigerless  DSSD (320 chans)  X-array (20 chans)  focal plane (20 chans)  Resolution comparable to analog (Ge/Si)  Pulse shape analysis  100 kHz/DSSD possible DDAQ was used in 4 experiments (two with DGS)

13. GRETINA at ATLAS workshop, March 2013 13 Possible GRETINA-FMA configurations 60 cm New frame 30-60-90 cm 30 cm like BGS New idea 30 cm

14. GRETINA at ATLAS workshop, March 2013 14 Thank you for your attention!