Infl8

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General Info

Secondary Beam(s)

  • 29Al13+, 31Si14+
  • Energy: ~10 MeV/u for each
  • Requested rate and purity: 5x104 pps, >10 %
  • Achieved rate (pps/pnA):
    • [June 19] (XXX pps/pnA) [XXX pnA XXXXXX]
  • Purity:
    • [June 19] XXX% best

Tuning Info

Primary Beam (energy) [max pnA]

  • 30Si?? [11.5 MeV/u, 345 MeV][120 / 50 pnA]
  • Target 1: 4 mg/cm2 Be (29Al13+)
  • Target 2: 12 mg/cm2 Be (29Al13+) --> if time
  • Target 3: D2 Gas w/ 1.9 mg/cm2 HAVAR windows (3.7 cm, 1400 mbarr, T=90K) [31Si14+]

29Al

Beam Label Energy [MeV] Brho [Tm] calc / TOF Scale Factor DE-E (50 / 1000 um) DE-E (150 / 1000) Target
30Si??+ primary 345 XXX TOF 71 / 273 MeV 273 / 71 MeV none
30Si14+ degraded 319.8 1.009 calc 76 / 244 MeV 305 / ~14 MeV 4 mg/cm2 Be
29Al13+ secondary 307.4 1.04767 calc 3.8% 66 / 241 MeV 256 / 51 MeV 4 mg/cm2 Be
30Si13+ contam 297 1.04767 calc 80 / 217 MeV 217 / 0 MeV 4 mg/cm2 Be
  • Scale Factor:
    • [June 19] 29Al13+ [307.4 MeV] from 30Si14+ [319.8 MeV] scale factor = 1.04767/1.009 = 1.038
  • Expected calculated rates for tuning (acceptable - ideal):
    • At EXIT Detector: >250-1000 pps/pnA (midplane slits set to ~+-4 mm, ~3% momentum acceptance).
    • At HELIOS Cross Detector: >70-250 pps/pnA (assumes ~25% transmission, maybe on the high side...)

31Si

Beam Label Energy [MeV] Brho [Tm] calc / TOF Scale Factor DE-E (50 / 1000 um) DE-E (150 / 1000) Target
30Si??+ primary 345 XXX TOF 71 / 273 MeV 273 / 71 MeV none
30Si14+ degraded 345 XXX TOF XXX / XXX MeV XXX / XXX MeV XXX
B5+ secondary 89 0.90318 TOF 12.5 / 76 MeV 44 / 45 MeV 4 mg/cm2 Be
30Si13+ contam 0.9316 calc 3.14% 13.7 / 73 MeV 49 / 37 MeV 12 mg/cm2 Be
  • Scale Factor:
    • [Date 19] 12B5+ [86.8 MeV] from 11B5+ [89 MeV] scale factor = 0.9316/0.90318 = 0.0314
  • Expected calculated rates for tuning (acceptable - ideal):
    • At EXIT Detector: >12000-14000 pps/pnA (midplane slits set to ~+-4 mm, ~3% momentum acceptance).
    • At HELIOS Cross Detector: >5000-6000 pps/pnA (assumes ~40% transmission, maybe on the high side...)