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Collimator scattering at JLab - link

Pre-NLCTA beam test slides from Pelle - link

Summary of results from beam test from Pelle - link

Beam parameters - 500um beam spot - 177cm & 6 foils

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10:37
Move in foils one by one and observe beam spot on phosphor screen. Picture and extracted spot size at each thickness can be seen below. The screen is about 75cm downstream of the exit window.

# foils

Tiff

FWHM

0

13PS31_20131002_104735_015-noFoils.tif

 

1

13PS31_20131002_104527_012-1foil.tif

 

2

13PS31_20131002_104452_011-2foils.tif

 

3

13PS31_20131002_104430_010-3foils.tif

 

4

13PS31_20131002_104356_009-4foils.tif

 

5

13PS31_20131002_104325_008-5foils.tif

 

6

13PS31_20131002_104029_007-6foils.tif

 

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Runs taken, all at 6 foils:

Time

Bunch charge (pC)

ADC1

Bias (V)

Ileak (uA)

~11:00

?~0.001

-

180

10

11:36

1.0

0.002

180

17

 

1.0

0.002

250

22

 

1.0

0.002

350

22

 

1

0.002

400

38

 

1

0.002

500

21

12:00

10

0.01

180

6

 

10

0.01

350

7

 

10

0.01

500

50

 

100

0.135

180

7

 

100

0.135

250

6

 

100

0.135

350

14

11:36
Everything looks ok for 1pC setting.

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