# 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+-0.15 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 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

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+-0.15 D1 tuned for 3 Mev, D2 tuned for 4.9 MeV

## Background

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 0 -0.6 - 0.4 837 204 4.10 D1 tuned for 3 Mev, D2 tuned for 3 MeV

## Data Analysis on Energy scan

D1 set for 3 MeV.

Sweeping Magnet D2 (MeV) Counts Time (s)

   Out            1.2694    844+- 29.1   209.9
Out            3         1212+-34.8   239.8
Out            4.9       1508+-38.8   359.9
in             3         398