Linac Status

May 19, 2015Time Meeting

D. Raparia

D. Raparia2

Status Linac running in good condition for polarized proton program and

BLIP

After last week OPPIS maintenance is low polarization but improving by time, will be determined today if maintenance is needed tomorrow behind APEX

Mod-3 driver keeps tripping since last Thursday

Average Current and Beam on HRS for BLIP

D. Raparia3

5/9/15 5/10/15 5/11/15 5/12/15 5/13/15 5/14/15 5/15/15 5/16/15 5/17/15 5/18/15 5/19/150

24

48

72

96

120

Average current (μA)

Beam on (HRS/day)

Target Change

Research Target, Mod 3 driver cart and SCR fan

NM065 chipmunk fail

Mod-3 Driver trips

- Replaced SCR fan

- Paced 100 uF cap across air flow switch,- Replace driver cart- Replace filament bias power supply- Replaced air flow switch- Bypass “4616 bias fault” , to get fault below - Jennings fault, rewire Jennings switch - Adjusted Filament bias voltage

D. Raparia4

FWHM (mm) at Harp 1 and 2

D. Raparia5

5/8/15 5/10/15 5/12/15 5/14/15 5/16/15 5/18/15 5/20/150

5

10

15

20

25

30

H1_FWHM_xH1_FWHM_yH2_FWHM_XH2_FWHM_y

Beam Center (mm) at Harp1 and 2

D. Raparia6

5/8/15 5/10/15 5/12/15 5/14/15 5/16/15 5/18/15 5/20/15

-3

-2

-1

0

1

2

3

4

5

6

H1XcH1YcH2XcH2Yc

7

Beamline Location

1. plunging harp2. 6.50” collimator3. bellows (3x)4. raster magnet5. steering magnets (existing, 2x)6. 4.00” collimator

7. plunging harp (opposite side)8. laser profile monitor9. beam current transformers (2x)10. beam position monitor11. beryllium window (existing)12. aluminum bellows (existing)

21’14’

HARP1

D. Raparia8

HARP2

D. Raparia9