PVDIS kinematics:

(All beam times are requested time from the proposal scaled by 0.6, from approved PAC 27 days/ requested 46 PAC days)

Kine#1

Kine#2

Kine#3

Kine#4

Kine#5

Kine#6 (no longer valid)

Kine#7

total time

running order

DIS #1 - Left arm only, 5 pass

	Beam energy	6.0 GeV	Note
	Beam current	85 uA
	Spectrometer momentum	3.66 GeV/c
	Spectrometer angle	12.9o
Target
25-cm LD2	Expected DIS electron rate per HRS	calc: 269.8kHz real: 212kHz
	Expected pion/e ratio (upper limit)	calc: 0.9 real: 24kHz, or 0.1
	Expected e+/e- ratio (upper limit)	calc: 0.07% real: 0.05%
	Expected total rate per HRS	513 kHz
	Expected asymmetry (with 80% included)	-91.3 ppm
	Running time (PAC hours), Production	255 hours*1HRS	requested 9 days*(2HRS)
	Running time (PAC hours), positive polarity	5 hours*1HRS	requested 4 hours*(2HRS)
Al dummy(1.62mm each)	Expected DIS electron rate	?
	Running time (PAC hours, should be 1.6% of LD2 time)	4 hours*1HRS	requested 3.5 hours*(2HRS)
PVDIS settings		Left arm only from run 25269	Right arm
	high threshold (mV)	-65mV	N/A
	correspond to ADC channel	~1100 on PRL1+PRL2	N/A
	medium threshold	-25mV	N/A
	correspond to ADC channel	~500 on PRL1	N/A
	low threshold	-20mV	N/A
	correspond to ADC channel	to be analyzed	N/A

        Note: Right arm thresholds are determined using June 09 RHRS test run results (run #22524 on 6/16, p0=-2.63 GeV/c, Eb=6.064GeV): high -105mV, medium -20mV, low -15mV.  ADC channel cuts are roughly: 1) in TS high cut: 2000*TScut(in mV)/90 on SH, and 1000*TScut(in mV)/90 in PS; 2) in PS: 350*PScut(in mV)/20; For other settings, scale each by the momentum.  For low threshold (pions), may need -20mV or higher.

DIS #2 - both left and right arms, 5 pass

	Beam energy	6.0 GeV	Note
	Beam current	85 uA
	Spectrometer momentum	2.63
	Spectrometer angle	20.0o
Target
25-cm LD2	Expected DIS electron rate per HRS	calc: 25.1kHz real: 20kHz
	Expected pion/e ratio (upper limit)	calc: 6.4 real: 48 kHz, or 2.4
	Expected e+/e- ratio (upper limit)	calc: 0.46% real:
	Expected total rate per HRS	186.2 kHz
	Expected asymmetry (with 80% included)	-160.7 ppm
	Running time (PAC hours), Production	904 hours*1HRS	requested 32.0 days*(2HRS)
	Running time (PAC hours), positive polarity	5 hours	requested 4 hours*(2HRS)
Al dummy (1.62mm each)	Expected DIS electron rate	?
	Running time (PAC hours, should be 1.6% of LD2 time)	15 hours*1HRS	requested 12.4 hours*(2HRS)
PVDIS settings		Left arm (scaled from kine #1)	Right arm
	high threshold (mV)	-65mV*2.63/3.66=-48 or -50mV(didn't work). Changed to -37mV later.	-90mV
	correspond to ADC channel	~1100*2.63/3.66=790 on PRL1+PRL2	SH: 2000 PS: 1000
	medium threshold	reduce from -25mV for kine #1 to -20mV	-20mV
	correspond to ADC channel	~400 on PRL1	PS: 350
	low threshold	-20mV	-20mV
	correspond to ADC channel	to be analyzed	SH: 2000*TScut/90=333 PS: 1000*TScut/90=167

Resonance #3 - Left arm only, 4 pass, 25-cm LD2 target only for production.

Beam energy	4.8 GeV	Note
Beam current	85 uA
Spectrometer momentum	4.0
Spectrometer angle	12.9o
Expected electron rate	857kHz
Expected pion background rate (upper limit)	pi/e=0.01
Expected asymmetry	-76.7 ppm (6.5%)
Running time (PAC hours)	30 hours * 1HRS	requested 12.5o, 28.6 hours * 1HRS
PVDIS settings		Left arm only
high threshold (mV)	-65mV*4.00/3.66=-70mV, should set to -50mV
correspond to ADC channel	~1100*4.0/3.66=1200 on PRL1+PRL2, if set to -70mV
medium threshold (mV)	-25mV, should set to -20mV, or unchanged from DIS#2
correspond to ADC channel	~500 on PRL1
low threshold (mV)	-20mV, or unchanged from DIS#2
correspond to ADC channel

Resonance #4 - Left arm only, 4 pass, 25-cm LD2 target only for production.

Beam energy	4.8 GeV	Note
Beam current	85 uA
Spectrometer momentum	3.55
Spectrometer angle	12.9o
Expected electron rate	566kHz
Expected pion background rate (upper limit)	pi/e=0.15
Expected asymmetry	-69.3 ppm (6.5%)
Running time (PAC hours)	57 hours * 1HRS	requested 42.6 hours * 1HRS
PVDIS settings		Left arm only
high threshold (mV)	-65mV*3.55/3.66, should set to -50mV
correspond to ADC channel	~1100 on PRL1+PRL2
medium threshold (mV)	-25mV, should set to -20mV, or unchanged from DIS#2
correspond to ADC channel	~500 on PRL1
low threshold (mV)	-20mV, or unchanged from DIS#2
correspond to ADC channel

Resonance #5 - start with RHRS, then use both arms, 4 pass, 25-cm LD2 target only for production.

Beam energy	4.8 GeV	Note
Beam current	85 uA
Spectrometer momentum	3.10
Spectrometer angle	12.9o
Expected electron rate	466kHz
Expected pion background rate (upper limit)	pi/e=0.69
Expected asymmetry	-61.7 ppm (6.5%)
Running time (PAC hours)	36 hours * 1HRS	requested 59.8 hours * 1HRS
PVDIS settings	Left arm	Right arm only
high threshold (mV)		-90mV*3.1/2.63=-105mV, may keep at -90mV
correspond to ADC channel		SH: 2000*TScut/90=2334 if using -105 PS: 1000*TScut/90=1167
medium threshold (mV)		-20mV*3.1/2.63=-24mV, may keep at -20mV
correspond to ADC channel		PS: 350*3.1/2.63=413 if using -24mV
low threshold (mV)		-20mV
correspond to ADC channel		SH: 2000*TScut/90=444 PS: 1000*TScut/90=222

Resonance #6 - start with RHRS, then use both arms, 4 pass, 25-cm LD2 target only for production.
this kinematics has been removed

Beam energy	4.8 GeV	Note
Beam current	85 uA
Spectrometer momentum	2.77
Spectrometer angle	19.0o
Expected electron rate	105kHz
Expected pion background rate (upper limit)
Expected asymmetry	-120.7 ppm
Running time (PAC hours)	27 hours*1HRS	requested 44.6 hours * 1HRS
PVDIS settings	Left arm	Right arm
high threshold (mV)		-105mV*2.77/2.63=-110mV
correspond to ADC channel		SH: 2000*TScut/90=2444 PS: 1000*TScut/90=1222
medium threshold (mV)		-20mV*2.77/2.63=-21mV
correspond to ADC channel		PS: 350*2.77/2.63=369
low threshold (mV)		-15mV or TBD
correspond to ADC channel		SH: 2000*TScut/90=333 PS: 1000*TScut/90=167

Resonance #7 - Left arm only, 5 pass, 25-cm LD2 target only for production.

Beam energy	6.0 GeV	Note
Beam current	85 uA
Spectrometer momentum	3.66
Spectrometer angle	15.0o
Expected electron rate	calc: 124kHz (central) real: 82kHz
Expected pion background rate (upper limit)	calc: pi rate 76kHz (0.61*e rate) real: 8.4kHz (0.1*e rate)
Expected asymmetry	-113.0 ppm
Running time (PAC hours)	12 hours * 1HRS	requested 14.0o, 4.0GeV/c, 19.0 hours * 1HRS
PVDIS settings		Left arm only
high threshold (mV)	should set to -50mV
correspond to ADC channel
medium threshold (mV)	should set to -20mV, or unchanged from DIS#2
correspond to ADC channel
low threshold (mV)	should set to -20mV, or unchanged from DIS#2
correspond to ADC channel

In PAC days:

Total DIS, 5-pass: 580+5 hours on LD2, 10 hours on Al dummy.
Total resonance, 5-pass: 12 hours on LD2.
Total resonance, 4-pass: 54 hours on LD2.

The following are in calendar days or hours:

Total 46 days (excluding commissioning):

Total DIS, 5-pass: 967+8.3 hours on LD2, 16.7 hours on Al dummy.
Total resonance, 5-pass: 20 hours on LD2.
Total resonance, 4-pass: 90 hours on LD2.


Production Plan:

1. Start with #1 on the left, #2 on the right. 
2. After #1 is finished (approximately 19 days), take #2 on both arms until 5 days towards beam down). 
3. Then, take 20 hours at #7 on left arm. 
4. Pass change to 4.8 GeV, assuming 8 hours.
5. Spend the rest on resonance running #3, #4, #5, #6. Starting with #3 and #4 on the left and #5 and #6 on the right, then switch left arm also to #5 and #6.

Reference: see PAC presentation .