Beam Text May 17 2012

Preparation

[Check List]

0. MATLAB emittance analysis: (working?) -- yes

1. Magnets: --Working

2. Camera: (a)--Working, (b)--shielding-good,(c) Sync? -- good

3. Flags: --Working

4. Farady Cup: hocked up? --yes

5. Blank off for camera on? --good

6. Gas bottle for valve full? --Yes

7. Gas bottle for flags full? --Yes

8. 3 Pickup Coils (Green Torroids): (1)@gun: hocked-up; (2)@accelerator exit: hocked-up to 2 red strip wire. Now connected to linac monitor panel which labeled as "J12 from back", "Scan field Mon" from front. (3)@end of beamline:

Start List

1) Valve exit of cavity opened?

2) Faraday cups are hocked up?

3) Target in?

4) Start the camera? Turn light on and off, observe if camera working. Load run script from "C:\Documents and Settings\sadiq\My Documents\26Apr2012\Camera_Settings".

Camera triggering issue

1. camera is triggered by something?

2. When camera trig is plugged into pulse generator, pulse generator set to trigger externally, but no external trigger connected to pulse generator, and Klystron HV is on, camera triggers.

3. Is camera being triggered by the noise created by the Klystron HV?

4. We have camera grounding issue.

can not bend the beam

Wrong polarity on the dipole. To switch the polarity on the dipole, we need turn on the power supply for the relays.

Energy Scan at 15 esh MeV

1. Tuning

Energy Switch	Out (High En Range)
Dipole Coil Current
e- Beam Energy ()	MeV (mapping )
Solenoid 1	12.9 A
Solenoid 2	13.7 A
Gun Hor	0.1 A
Gun Ver	0.2 A
Output Hor	-0.4 A
Output Ver	0.0 A
Rep Rate	63
Gun HV	8.97(Knob Setting)
Gun Grid Voltage	10 (Knob Setting)
RF frequency	2856.291 MHz
Modulator HV Power Supply	4.84 (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
Peak Current on FC 1 (45 deg)	114 mAmps 400 px
Peak Current on FC 2 (45 deg)	mAmps
Scope on FC 1	200 px
Scope on FC 2	200 px
Beam Spot	200 px

En Scan

Dipole    FC
Coil      Current
Current   Reading
(A)       (mA)
27        1.264
28        1.596
29        2.336
30        3.7
30.5      4.18
31        4.7
31.5      7.26
32        8.56

Quad Scanning for Emittance

En Scan at 15.6004336 MeV. Q1 is on, All other quads are off. 88.8 mAmp Peak Current.

1) Scan from -10 Amps to 10 Amps

2) Increment at 0.4 Amps.

3) Name images by numbers start from 1. Then go on.

Like: -10 Amp is 1, -9.6 Amp is 2, and so on til 10 Amp is named 51.

4) Scan multipole (10) times from -10 to 10 Amps, and put them in different folders.

5) For each time, take back ground images. It should be done when RF is on and gun is off.

6) After the scan take a scope image for the current of the FC after the OTR screen.

Scan with Q1

After scan, put the files Run "Emit_Calc_N10toP10_Q1" under "C:\Documents and Settings\sadiq\My Documents\MATLAB\Emit_Calc\15MeV\Q1" directory.

Scan with Q6

After scan, put the files Run "Emit_Calc_N10toP10_Q6" under "C:\Documents and Settings\sadiq\My Documents\MATLAB\Emit_Calc\15MeV\Q1" directory.

Energy Scan at Low Energy

1. Tuning

Energy switch is in, linac operates at low energy

Energy Switch	Out (High En Range)
Dipole Coil Current
e- Beam Energy ()	MeV (mapping )
Solenoid 1	12.1 A
Solenoid 2	9.6 A
Gun Hor	+ 0.3 A
Gun Ver	0 A
Output Hor	+ 0.6 A
Output Ver	+ 0.3 A
Rep Rate	63
Gun HV	8.99(Knob Setting)
Gun Grid Voltage	10 (Knob Setting)
RF frequency	2856.388 MHz
Modulator HV Power Supply	4.185 (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
Peak Current on FC 1 (45 deg)	88.8 mAmps
Peak Current on FC 2 (45 deg)	26.4 mAmps
Scope on FC 1	99.2 mA 200 px
Scope on FC 2	200 px
Beam Spot	200 px

Energy Scan

Dipole    FC
Coil      Current
Current   Reading
(A)       (mA)
12        1.712
12.5      3.344        
13        6.72
13.5      9.44
14        20
14.5      33.12
15        33.6
15.3      28.64
15.5      24.56
15.7      20.88
16        16.4
16.2      12.48
16.5      9.36 
16.7      6.48
17        3.94
17.3      1.968
17.5      1.368
17.8      0.936
18        0.648
19        0.332
20        0.332

Quad Scanning for Emittance

En Scan at 15.6004336 MeV. Q1 is on, All other quads are off. 88.8 mAmp Peak Current.

1) Scan from -10 Amps to 10 Amps

2) Increment at 0.4 Amps.

3) Name images by numbers start from 1. Then go on.

Like: -10 Amp is 1, -9.6 Amp is 2, and so on til 10 Amp is named 51.

4) Scan multipole (10) times from -10 to 10 Amps, and put them in different folders.

5) For each time, take back ground images. It should be done when RF is on and gun is off.

6) After the scan take a scope image for the current of the FC after the OTR screen.