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

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...)