Beam Test Jul 12 2012

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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.

Camera Trig Timing.png


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

tune to 45 degree line

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

document the settings and current oFC2


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.