Camera Trig

Tune the beam for 15 MeV range, see the beam with camera. Get camera triggering.

Tune The Beam for 11-12 MeV

Energy Switch	Out (High En)
Solenoid 1	6.8 A
Solenoid 2	1.2 A
Gun Hor	-0.1 A
Gun Ver	0 A
Output Hor	+0.2 A
Output Ver	+0.4 A
Rep Rate	8
Gun HV	10 (Knob Setting)
Gun Grid Voltage	10 (Knob Setting)
RF frequency	2856.272 MHz
Modulator HV Power Supply	4.28 (Knob Setting)
RF macro Pulse Length (FWHM)	300 ns
Q1 (A)	-2.6
Q2 (A)	-3.2
Q3 (A)	-3.6
Q4 (A)	-1.5
Q5 (A)	+0.7
Q6 (A)	-3.6

Beam Current 0 degree FC:

Beam Spot at 0 degree OTR screen:

Scintillator pulse count

Scintillator is located at the end of the 90 degree beamlien (after the thin window). Rates measured with W1 in and out.

Energy Switch	Out (High En)
Solenoid 1	6.8 A
Solenoid 2	1.2 A
Gun Hor	0 A
Gun Ver	+0.2 A
Output Hor	+1.2 A
Output Ver	0 A
Rep Rate	8
Gun HV	10 (Knob Setting)
Gun Grid Voltage	10 (Knob Setting)
RF frequency	2856.304 MHz
Modulator HV Power Supply	4.28 (Knob Setting)
RF macro Pulse Length (FWHM)	300 ns
Q1 (A)	-10
Q2 (A)	-10
Q3 (A)	0
Q4 (A)	-2.3
Q5 (A)	2.5
Q6 (A)	-3.5
Q7 (A)	-6.1
Q8 (A)	0
Q9 (A)	+0.6
Q10 (A)	-0.4

W1	Time (s)	D1 (A)	Jaws	Counts	counts/second	conditions
in	209.1	0	Full open	1842	8.81	tuned to fc1 10 MeV
out	192.5	0	Full open	1052	5.46	tuned to fc1 10 MeV
in	226	2.5	Full open	2082	9.21	tuned to fc2 1 MeV
in	205	18.8	Full open	1784	8.7	tuned to fc2 10 MeV
out	18.8	Full open			too much pile-ups	tuned to fc2 10 MeV

Bend the beam by 45 degree

When we bend the beam by 45 degree, there were too much current on the scintilator. Gun grid voltage is lowered to lower the current.

Energy Switch	Out (High En)
Solenoid 1	6.8 A
Solenoid 2	1.2 A
Gun Hor	0 A
Gun Ver	+0.2 A
Output Hor	+1.2 A
Output Ver	0 A
Rep Rate	8
Gun HV	10 (Knob Setting)
Gun Grid Voltage	6.42 (Knob Setting)
RF frequency	2856.304 MHz
Modulator HV Power Supply	4.28 (Knob Setting)
RF macro Pulse Length (FWHM)	300 ns
Q1 (A)	-10
Q2 (A)	-10
Q3 (A)	0
Q4 (A)	-2.3
Q5 (A)	2.5
Q6 (A)	-3.5
Q7 (A)	-6.1
Q8 (A)	0
Q9 (A)	+0.6
Q10 (A)	-0.4

Bend the beam by 90 degree

same tune as above

W1	D1 (A)	D2 (A)	Jaw width (cm)	Time (s)	Counts	counts/second	conditions
in	5.8	3	0.2	209.9	844+- 29.1	4.02+-0.14	D1 tuned for 3 Mev, D2 tuned for 1.2694 MeV
in	5.8	5.8	0.2	239.8	1212+-34.8	5.05+- 0.15	D1 tuned for 3 Mev, D2 tuned for 3 MeV
in	5.8	9	0.2	359.9	1508+-38.8	4.19+-0.11	D1 tuned for 3 Mev, D2 tuned for 4.9 MeV

Play with quads

same tune as above, except change in some of the quads.

Change quads: q4, q5, q6, q7, see the change in the rate.

W1	D1 (A)	D2 (A)	Jaw width (cm)	q4 (A)	q5 (A)	q6 (A)	q7 (A)	q8 (A)	q9 (A)	q10 (A)	Counts	Time (s)	counts/second	Mean pulse area in the scope	conditions
in	5.8	5.8	0.2	- 0	+ 0	- 0	- 0	0	0.6	0.4	3598	279.9	12.85		D1 tuned for 3 Mev, D2 tuned for 3 MeV
in	5.8	5.8	0.2	- 2	+0	- 0	- 0	0	0.6	0.4	3895	299.4	13.01		D1 tuned for 3 Mev, D2 tuned for 3 MeV
in	5.8	5.8	0.2	+ 2	+0	- 0	- 0	0	0.6	0.4	2757	200.1	13.78		D1 tuned for 3 Mev, D2 tuned for 3 MeV
in	5.8	5.8	0.2	+ 2	+2	- 0	- 0	0	0.6	0.4	2522	199.9	12.62		D1 tuned for 3 Mev, D2 tuned for 3 MeV
in	5.8	5.8	0.2	+ 2	-2	- 0	- 0	0	0.6	0.4	3598	244.9	14.69		D1 tuned for 3 Mev, D2 tuned for 3 MeV
in	5.8	5.8	0.2	+ 2	-2	- 2	- 0	0	0.6	0.4	2996	340	8.81	7.8 n	D1 tuned for 3 Mev, D2 tuned for 3 MeV
in	5.8	5.8	0.2	+ 2	-2	+ 2	- 0	0	0.6	0.4	1777	199.9	8.89	8.2 n	D1 tuned for 3 Mev, D2 tuned for 3 MeV
in	5.8	5.8	0.2	+ 2	-2	+ 0	- 0	0	0.6	0.4	3746	259.8	14.42	5.1 n	D1 tuned for 3 Mev, D2 tuned for 3 MeV
in	5.8	5.8	0.2	+ 2	-2	+ 0	- 2	0	0.6	0.4	3049	220.2	13.85	5.7 n	D1 tuned for 3 Mev, D2 tuned for 3 MeV
in	5.8	5.8	0.2	+ 2	-2	+ 0	+ 2	0	0.6	0.4	3062	252.7	12.11	5.9 n	D1 tuned for 3 Mev, D2 tuned for 3 MeV
in	5.8	5.8	0.2	+ 2	-2	+ 0	+ 0	0	0	0	2729	210.1	13.0	5.5 n	D1 tuned for 3 Mev, D2 tuned for 3 MeV
in	5.8	5.8	0.2	+ 2	-2	+ 0	+ 0	+ 2	+ 0	+ 0	1133	250.1	4.5	6.7 n	D1 tuned for 3 Mev, D2 tuned for 3 MeV
in	5.8	5.8	0.2	+ 2	-2	+ 0	+ 0	+ 0	+ 0	+ 0					D1 tuned for 3 Mev, D2 tuned for 3 MeV

We placed a permanent dipole magnet to sweep the beam. The sweeping magnet added to the end of the 3rd triplet magnets to sweep the beam.

W1	Sweeping magnet	D1 (A)	D2 (A)	Jaw width (cm)	q4 (A)	q5 (A)	q6 (A)	q7 (A)	q8 (A)	q9 (A)	q10 (A)	Counts	Time (s)	counts/second	conditions
in	in	5.8	5.8	0.2	+ 2	-2	+ 0	- 0	0	0.6	0.4	398	114.2	3.5	D1 tuned for 3 Mev, D2 tuned for 3 MeV
in	in	5.8	0	0.2	- 2	+2	0	0	0	-0.6	- 0.4	587	152.6	3.8	D1 tuned for 3 Mev, D2 tuned for 3 MeV
in	in	-5.8	0	0.2	- 2	+2	0	0	0	-0.6	- 0.4	884	240.5	3.8	D1 tuned for 3 Mev, D2 tuned for 3 MeV

We removed the permanent dipole magnet.

W1

Sweeping magnet

D1 (A)

D2 (A)

Jaw width (cm)

q4 (A)

q5 (A)

q6 (A)

q7 (A)

q8 (A)

q9 (A)

q10 (A)

Counts

Time (s)

counts/second

conditions

in

out

-5.8

0

0.2

- 2

+2

0

-0.6

- 0.4

837

204

4.10

D1 tuned for 3 Mev, D2 tuned for 3 MeV

Positron Energy Scan

Data from above runs used to get the energy profile of positrons around 3 MeV.

Measurements