Infl8

General Info

• RAISOR Devel
• [June 19]
• ²⁹Al, ³¹Si
• Location in in-flight ELOG
• @ HOMEPLATE and possibly SHORTSTOP

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 ^XXXX^XX]
• 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===========

²⁹Al - 4 mg/cm² target

Beam	Label	Energy [MeV]	Brho [Tm]	calc / TOF	Scale Factor	DE-E (50 / 1000 um)	DE-E (150 / 1000)	Target
30Si??+	primary	345	XXX	calc		71 / 273 MeV	273 / 71 MeV	none
30Si14+	degraded	319.8	1.009	tof		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===========

³¹Si - D₂ gas target

Beam	Label	Energy [MeV]	Brho [Tm]	calc / TOF	Scale Factor	DE-E (50 / 1000 um)	DE-E (150 / 1000)	Target
30Si??+	primary	345	XXX	calc		71 / 273 MeV	273 / 71 MeV	none
30Si14+	degraded	301.2	0.9791	calc		79 / 222 MeV	301.2 / ~0 MeV	D2 Gas
31Si14+	secondary	301.3	0.9944	calc	1.6%	81 / 219 MeV	301.3 / ~0 MeV	D2 Gas
30Si13+	contam	267.7	0.9944	calc		87 / 181 MeV	267.7 / 0 MeV	D2 Gas

• Scale Factor:
  • [June 19] ³¹Si¹⁴⁺ [301.3 MeV] from ³¹Si¹⁴⁺ [301.2 MeV] scale factor = 0.9944/0.9791 = 1.0156

• Expected calculated rates for tuning (acceptable - ideal):
  • At EXIT Detector: >5000-10000 pps/pnA (midplane slits set to ~+-4 mm, ~3% momentum acceptance).
  • At HELIOS Cross Detector: >1000-2000 pps/pnA (assumes ~20% transmission, maybe on the high side...)