Revision as of 14:42, 6 October 2015

Fall 2015

Calibration data needs as of Oct. 6, 2015

Detector	Status	Data in Hand	Est. Data Needed	Notes
BCAL	More Needed	130k pi0	25-50x	pi0 cluster energy > 750 MeV
CDC	More Needed
FCAL	More Needed	125k	10x	pi0 cluster energy > 1 GeV
FDC	More Needed			3 shifts, 10^-4 radiator, 100 nA, no field needed
PS/PSC	OK
Start Counter	More Needed	75 M	20x	basic calibrations are good, more refinement possible
TAGH	OK
TAGM	More Needed		10 M - 50 M
TOF	OK			need to verify stability of calibrations with more data

6 GeV settings: 5.5 GeV e- beam, 50 um diamond radiator, 5 mm collimator, E(gam) = 2 - 5.5 GeV
12 GeV settings: 12 GeV e- beam, 20 um diamond radiator, 3.4 mm collimator, E(gam) = 7 - 12 GeV
rate(12 GeV) / rate(6 GeV) ~ 80% [using cobrems in bggen, incl. plastic target on nose removal in 12 GeV era].
Geometrical factors: (12 GeV/6 GeV)
- SC - ~1x (straight section drives needs)
- BCAL - ~1x (both photons in BCAL)
- FCAL - ~8x (both photons in FCAL)

@@ Line 14: / Line 14: @@
 | BCAL
 | style="background-color: yellow;" | More Needed
-| 1.3 M (pi0)
+| 130k pi0
-| 100x
+| 25-50x
 |
-| pi0 numbers assuming cluster > 350 MeV
+| pi0 cluster energy > 750 MeV
 |-
 | CDC
@@ Line 78: / Line 78: @@
 === Notes ===
-* Data needed depends strongly on S/B, especially for calorimeters
+* Data needed depends strongly on S/B, especially for calorimeters.
+* Lowering thresholds can have a large effect, too
 === Scaling from 6 GeV to 12 GeV ===