Beam Test Jul 12 2012

JAI Camera Triggering

The fall of the TTL pulse triggers the camera.

Camera trigger should arrive at lest 30 micro-second earlier than RF pulse to get the beam image on the OTR.

To do this the first RF pulse trigger should be delayed to trigger the camera for the next RF pulse.

Note

RF not would trigger the camera. We added a ground strap to the double shielded BNC cable and covered some unshielded cables with tin foil. This stopped the RF from triggering the camera.

tune 3 MeV electrons to the 90 degree line

tune to 0 degree line

Determine the magnet settings needed to optimize the current to FC1.

Take a picture of the beam spot on the YaG and FC1

Energy Switch	Out (High En Range)
Solenoid 1	7.8 A
Solenoid 2	3.9 A
Gun Hor	0.1 A
Gun Ver	0 A
Output Hor	0.3 A
Output Ver	0.3 A
Rep Rate	6
Gun HV	10 (Knob Setting)
Gun Grid Voltage	10(Knob Setting)
RF frequency	2856.268 MHz
Modulator HV Power Supply	3.66 (Knob Setting)
RF macro Pulse Length (FWHM)	200 ns
Q1 (A)	0
Q2 (A)	0
Q3 (A)	0
Q4 (A)	0
Q5 (A)	0
Q6 (A)	0

100 px

tune to 45 degree line

Optimize the current to FC2 using Quad 7 and the energy slits

Q7 did not help to increase beam current at FC45

document the magnet element settings and current to FC2.

Transmission from zero Line to 45 degree line is about 4%.

Increased Reprate to 17 Hz and Minor tune change

When reprate was at 6 Hz, the current was too low. So, the reprate was increased. to 17 Hz.

Energy Switch	Out (High En Range)
Solenoid 1	6.1 A
Solenoid 2	2.7 A
Gun Hor	0.1 A
Gun Ver	0 A
Output Hor	0.4 A
Output Ver	0.4 A
Rep Rate	17
Gun HV	10 (Knob Setting)
Gun Grid Voltage	10(Knob Setting)
RF frequency	2856.817 MHz
Modulator HV Power Supply	3.66 (Knob Setting)
RF macro Pulse Length (FWHM)	200 ns
Q1 (A)	0
Q2 (A)	0
Q3 (A)	0
Q4 (A)	0
Q5 (A)	0
Q6 (A)	0

tune to 90 degree

Optimize current to FC3 using last 3 quads

Take scope picture

trasmission

Make several measurements using all three FCs to determine the transmission.

Do this by transporting beam to each several times.

OTR and YAG comparison

Beam Tuned to 10 MeV

Energy Switch	In (Low En Range)
Solenoid 1	5 A
Solenoid 2	5.7 A
Gun Hor	- 0.1 A
Gun Ver	0 A
Output Hor	0 A
Output Ver	0 A
Rep Rate	29
Gun HV	10 (Knob Setting)
Gun Grid Voltage	10 (Knob Setting)
RF frequency	2856.297 MHz
Modulator HV Power Supply	4.13 (Knob Setting)
RF macro Pulse Length (FWHM)	200 ns
Q1 (A)	1
Q2 (A)	1
Q3 (A)	2
Q4 (A)	0
Q5 (A)	0
Q6 (A)	0

We were not be able to see the beam spot. So, we tuned energy up to see the beam.

11~15 Mev

We were not be able to see the beam spot. So, we tuned energy up to see the beam. RF power nub was at 4.32, we are not about the energy.

Energy Switch	In (Low En Range)
Solenoid 1	8.8 A
Solenoid 2	5.7 A
Gun Hor	0 A
Gun Ver	0 A
Output Hor	0 A
Output Ver	0.4 A
Rep Rate	20
Gun HV	10 (Knob Setting)
Gun Grid Voltage	10(Knob Setting)
RF frequency	2856.297 MHz
Modulator HV Power Supply	4.13 (Knob Setting)
RF macro Pulse Length (FWHM)	200 ns
Q1 (A)	-0.9
Q2 (A)	0
Q3 (A)	-0.1
Q4 (A)	+0.9
Q5 (A)	0
Q6 (A)	-0.5