Instrumentation Request List for Experiment E06-010

Beam

Polarization [%] yes, ~85%

Beam polarimetry (Compton/Møller) Moller absolute 3%, Compton relative 5%, also use Compton to monitor background

Helicity flip scheme (delayed/quartet/duo) not-delayed

Energy range [GeV] 1.2, 2.4, 5.9 GeV

Energy measurement (Arc/EP) 1 or 2 Arc to cross calibrate Tiefenback

Current range [µA] 0-15uA with 3He, up to 100 uA for solid targets

Spot size (h x v) [s] [µm] 100-200 x 100-200

Raster size (square) (h x v/ø) [mm] 2-4 x 2-4

Energy spread [s] <5x10^-4

Energy lock: yes

Charge feedback: yes

Harp/BPM/BCM: yes and will do calibration

Targets (specify thickness)

Photon radiator No

Polarized 3He, 40 cm, ~12 atm. Field in all 3 directions. Frequent spin-flip.

Reference cell, H2, He3 and N2, 40 cm, ~12 atm

Solid targets (specify each)

12C (50mg/cm2) with 1mm hole

optics (7 foil 12C, each 50 mg/cm2) and BeO
Empty

Spectrometers (specify required detectors)

HRS-L HRS-R Not in use

Angle range [°]: 16, 45, 56

Momentum range [GeV/c] 0.6 - 4

VDC1 yes

VDC2 yes

S0 no

S1 yes

S2m yes

Gas Cherenkov (long/short) short

A1 yes

A2 no

FPP no

Preshower/Shower yes/yes

RICH yes

BigBite:

Angle range [°]: 30

Current range (A): 0-710 A

Drift Chambers yes (3)

Scientillators yes

Gas Chrenkov yes

Shower/Preshower yes

Trigger/DAQ

Coincidence/single HRS_L Coincidence with BigBite

Define trigger: S1+S2m in HRS_L, Preshower+Shower in BigBite

Other Instrumentation:

Lumi detectors

HAPPEX DAQ

Target spin signals to DAQ

Shielding for BigBite front-end electronics

Shielding for BigBite DAQ weldment