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== General Info ==
* Exp to HELIOS
* [June 19]
* <sup>31</sup>Si
* [http://www.phy.anl.gov/elog/INFL001_19O/144 Location in in-flight ELOG]
* @ SHORTSTOP

== Secondary Beam ==
*'''<sup>31</sup>Si<sup>14+</sup>'''
*Energy: ~10.6 MeV/u 
*Requested rate and purity: 5x10<sup>4</sup> pps, >10 %
*Achieved rate (pps/pnA):
**[June 19] Target (5m pps/pnA) [20 pnA <sup>30</sup>Si<sup>14+</sup>]
**[June 19] Cross (13k pps / pnA)
**[June 19] Exit (>25k pps / pnA)
*Purity:
**[June 19] 50% best (.001% - 50% range)

==Tuning Info==

Primary Beam (energy) [max pnA]
* <sup>30</sup>Si<sup>14+</sup> [11.5 MeV/u, 345 MeV][120 / 50 pnA]
* Will have 7+ from the source and 14+ after stripping to remove 40Ar contamination at original 9+ charge state

*Target: D2 Gas w/ 1.9 mg/cm<sup>2</sup> HAVAR windows (3.7 cm, 1400 mbarr, T=90K) [<sup>31</sup>Si<sup>14+</sup>]

===========<sup>31</sup>Si=================

'''<sup>31</sup>Si - D<sub>2</sub> gas target'''
{| class="wikitable"
|-
! Beam !! Label !! Energy [MeV]  !! Brho [Tm]  !! calc / TOF  !! Scale Factor !! DE-E (50 / 1000 um) !! DE-E (150 / 1000) || Target
|-
| <sup>30</sup>Si<sup>14+</sup> || primary || 345 || XXX ||tof || ||71 / 273 MeV || 273 / 71 MeV || none
|-
| <sup>30</sup>Si<sup>14+</sup> || degraded || 298 || XXX ||tof || || 79 / 222 MeV || 301.2 / ~0 MeV || D2 Gas
|-
| <sup>31</sup>Si<sup>14+</sup> || secondary || XXX || XXX ||calc || 1.6% || 81 / 219 MeV || 301.3 / ~0 MeV|| D2 Gas
|-
| <sup>30</sup>Si<sup>13+</sup> || contam || XXX || XXX || calc || || 87 / 181 MeV || 267.7 / 0 MeV || D2 Gas
|-
|}

* Scale Factor: 
**[June 19] <sup>31</sup>Si<sup>14+</sup> [301.3 MeV] from <sup>31</sup>Si<sup>14+</sup> [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...)