Linac Status

June 16, 2015Time Meeting

D. Raparia

D. Raparia2

Status Linac running in good condition for polarized proton program (200

MeV) and BLIP at 117 MeV

6/10/15: Maintenance ( ~ 7 HRS) 6/14/15: BLIP beam stopped at 8:00 AM 6/15/15: Changed energy to 117 MeV 6/15/15: Replaced tube 7835 in mod 6 6/15&16/15: Smaller beam (1.1 inch Dia) for Pt target

Average Current and Beam on HRS for BLIP

D. Raparia3

6/8/15 6/9/15 6/10/15 6/11/15 6/12/15 6/13/15 6/14/15 6/15/15 6/16/150

24

48

72

96

120

Average current (μA)

Beam on (HRS/day)

MaintenanceTarget and Energy Changed

FWHM (mm) at Harp 1 and 2

D. Raparia4

6/8/15 6/9/15 6/10/15 6/11/15 6/12/15 6/13/15 6/14/15 6/15/15 6/16/15 6/17/150

5

10

15

20

25

30

H1_FWHM_xH1_FWHM_yH2_FWHM_XH2_FWHM_y

FWHM (mm) at Target (projected)

D. Raparia5

6/8/15 6/9/15 6/10/15 6/11/15 6/12/15 6/13/15 6/14/15 6/15/15 6/16/150

2

4

6

8

10

12

14

FWHMxFWHMy

(RMS)

Beam Center (mm) at Harp1 and 2

D. Raparia6

6/8/15 6/9/15 6/10/15 6/11/15 6/12/15 6/13/15 6/14/15 6/15/15 6/16/15

-20

-15

-10

-5

0

5

10

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