Beam Test Apr 24 2012

Getting Ready Punchlist

1) Get matlab ready for emittance measurement. (Not done due to Matlab licence issue)

(Done) 2) Install control box. 
(Done) 3) Clean up imaging system.
(Done) 4) Determine dipole current setting.

Test List

Energy Test

1. Chad tunes HRRL

4.11

RF: 2857.351

MOD HVPS	RF	FC1
4.11 (nob)	2857.351	34.2 mA

Test beam stability at different energies

Start from 2 MeV go up energy.

Assuming magnet polarity swith "up" as positive and "down" as negative.

16 MeV

e- Beam Energy (estimate)	16 MeV
Solenoid 1	16.2 A
Solenoid 2	0 A
Gun Ver	-0.2 A
Gun Hor	0 A
Output Hor	-0.3 A
Output Ver	-1.2 A
Gun HV	(Knob Setting)
Gun Grid Voltage	(Knob Setting)
RF frequency	2856.382 MHz
Modulator HV Power Supply	4.98 (Knob Setting)
RF macro Pulse Length (FWHM)	300 ns
Q1 (A)	0
Q2 (A)	0.6
Q3 (A)	0
Q4 (A)	+10
Q5 (A)	-7
Q6 (A)	-5
Peak Current on FC	135 mAmps
Scope on FC	File:Hrrl 24Apr2012 EnTest 16MeV FC cur.png
Beam Spot	File:Hrrl 24Apr2012 EnTest 16MeV beam im.png

14 MeV

e- Beam Energy (estimate from 2011 Mar setting)	14 MeV (with big power supply Check with chad)
Solenoid 1	16.2 A
Solenoid 2	0 A
Gun Ver	-0.2 A
Gun Hor	0 A
Output Hor	-0.3 A
Output Ver	-1.2 A
Gun HV	(Knob Setting)
Gun Grid Voltage	(Knob Setting)
RF frequency	2856.382 MHz
Modulator HV Power Supply	4.40 (Knob Setting)
RF macro Pulse Length (FWHM)	300 ns
Q1 (A)	0
Q2 (A)	0
Q3 (A)	0
Q4 (A)	+10
Q5 (A)	-7
Q6 (A)	-4
Peak Current on FC	88 mAmps
Scope on FC	File:Hrrl 24Apr2012 EnTest 14MeV FC cur.png
Beam Spot	File:Hrrl 24Apr2012 EnTest 14MeV beam im.png

10 MeV First Setting

e- Beam Energy ()
Solenoid 1	16.2 A
Solenoid 2	0 A
Gun Ver	-0.2 A
Gun Hor	0 A
Output Hor	-0.3 A
Output Ver	-1.2 A
Gun HV	(Knob Setting)
Gun Grid Voltage	(Knob Setting)
RF frequency	2856.382 MHz
Modulator HV Power Supply	4.40 (Knob Setting)
RF macro Pulse Length (FWHM)	300 ns
Q1 (A)	0
Q2 (A)	0
Q3 (A)	0
Q4 (A)	+10
Q5 (A)	-7
Q6 (A)	-4
Peak Current on FC	88 mAmps
Scope on FC	File:Hrrl 24Apr2012 EnTest 14MeV FC cur.png
Beam Spot	File:Hrrl 24Apr2012 EnTest 14MeV beam im.png

10 MeV Second Setting- Saidq's Tune

e- Beam Energy ()	10 MeV
Solenoid 1	7.2 A
Solenoid 2	2.9 A
Gun Hor	0 A
Gun Ver	0 A
Output Hor	-0.2 A
Output Ver	0.3 A
Gun HV	10.00 (Knob Setting)
Gun Grid Voltage	10.00 (Knob Setting)
RF frequency	2856.373 MHz
Modulator HV Power Supply	4.20 (Knob Setting)
RF macro Pulse Length (FWHM)	300 ns
Q1 (A)	0
Q2 (A)	0
Q3 (A)	0
Q4 (A)	0
Q5 (A)	0
Q6 (A)	0
Peak Current on FC	73.2 mAmps
Scope on FC	File:Hrrl 24Apr2012 EnTest 14MeV FC cur.png
Beam Spot	File:Hrrl 24Apr2012 EnTest 14MeV beam im.png

4-5 MeV Setting

Energy switch changed to low energy setting. Part of the cavity is grounded.

Energy Switch	In (Part of the cavity is grounded, HRRL low energy operation mode )
e- Beam Energy ()	4-5 MeV
Solenoid 1	7.2 A
Solenoid 2	2.9 A
Gun Hor	0 A
Gun Ver	0 A
Output Hor	-0.2 A
Output Ver	0.3 A
Gun HV	10.00 (Knob Setting)
Gun Grid Voltage	10.00 (Knob Setting)
RF frequency	2856.373 MHz
Modulator HV Power Supply	4.00 (Knob Setting)
RF macro Pulse Length (FWHM)	300 ns
Q1 (A)	0
Q2 (A)	0
Q3 (A)	0
Q4 (A)	0
Q5 (A)	0
Q6 (A)	0
Peak Current on FC	mAmps
Scope on FC	File:Hrrl 24Apr2012 EnTest 4MeV FC cur.png
Beam Spot	File:Hrrl 24Apr2012 EnTest 4MeV beam im.png

Gun has been up to air for 3 times. It could be oxidation, contamination. Or it could be gun died, less likely. Roasting the gun to burn off the contamination is an idea. Chad just roasted gun for with higher current, we saw gun current increased many times. We will leave roasted for one night.