Wire Scanner and BSRT statusF.Roncarolo, E. Bravin, A. Rabiller

S. Bart Pedersen, A. Guerrero J.Emery, M. Sapinsky

LHC BOC, 15-March-2011

F.Roncarolo, LHC BOC, Mar 2011 2

Wire Scanners

Quite some work done on software and hardware

Standard mode (40 MHz bunch-to-bunch) Electronics installed on all devices and commissioned (J.Emery) FE setup for synchronizing bunch selection (A.Guerrero) OP GUI: few bugs corrected, new PRO version released (E.McCrory, T.Lahey)X Beam1: 200 Hz baseline noise on PM signal to be cured (J.Emery, TechStop)

Turn Mode (~ 10us Averaging)X B1 needs new delay w.r.t. turn clock to be adjusted in order to open gate at

bucket 1 B2 OK

GeneralX FE fits (sent to Logging DB) to be checked (anyhow all profiles logged, Offline fit

always possible)X Need MD to study absolute accuracy

F.Roncarolo, LHC BOC, Mar 2011

WS B1

3

F.Roncarolo, LHC BOC, Mar 2011

WS B2

4

F.Roncarolo, LHC BOC, Mar 2011

BSRT Hardware

5

During shut-down (A.Rabiller et al.) Optical path re-alignment Slow camera translation stage for additional remote focusing degree of freedom Intensified Fast Camera installedX Alignment to be further improved (especially B1) as soon as new external lasers

deliveredX Fast Camera Ethernet connection not stable yet

F.Roncarolo, LHC BOC, Mar 2011

BSRT Software/Control

Front End (A.Guerrero) Automatic optical filters and camera gain settings based on image

acquisition feedback DONE get rid of theoretical tables vs beam energy&intensity

Automatic entrance mirror steering based on image acquisition feedback Almost DONE can automatically look for best focus vs beam energy

BI Expert GUI (S.Bart Pedersen, E.Bravin) subscription to FBCT bunch lists on demand bunch scans

X Scan dies as GUI closed

OP Fixed Display (L.Ponce)

OP GUI (LAFS: Dennis Nicklaus) designed at early BSRT stagex Nobody using itx LAFS personnel (McCrory, Nicklaus, et al) are ready to modify/upgrade

6

F.Roncarolo, LHC BOC, Mar 2011

BSRT software NEXT

7

Front End

Fully commission and test stability of automatisms based on feed-back

Major upgrade: move profile fits from FE to daemon process on US45 PC (already used for automatic controls)

Bunch Scans (Front End and/or GUIs)

Short termEquip FE with FBCT subscription and automatically initiate scans ?

Upgrade OP Gui for bunch scans? Who?

F.Roncarolo, LHC BOC, Mar 2011

BSRT calibration

8

Preliminary results of cross-calibration w.r.t. WSCamera translation allows to find a better focusing than last yearWe will compute best correction factors vs energy and publish to logging

Many studies still needed to understand absolute accuracyX FocusingX Aberration (geometric,chromatic)X Diffraction

Correction Factors [mm] in quadrature

B1 450 GeV 3500 GeV

HOR 0.5 0.45

VER 0.4 0.4

Correction Factors [mm] in quadrature

B2 450 GeV 3500 GeV

HOR 0.5 0.45

VER 0.4 0.5

Protons Oct 450 GeV 3500 GeV

B1H 0.70 0.57

V 0.63 0.50

B2H 0.60 0.59

V 0.50 0.77

Protons Nov 450 GeV 3500 GeV

B1H 0.60 0.50

V 0.95 0.55

B2H 0.60 0.52

V 0.65 0.42

Ions 450 GeV 3500 GeV

B1H 0.60 0.40

V 0.99 0.65

B2H 0.60 0.55

V 0.50 0.40

Corr Factors 20102011 (prelim.)

F.Roncarolo, LHC BOC, Mar 2011

BSRT vs WS (preliminary)

9

F.Roncarolo, LHC BOC, Mar 2011

BSRT vs WS (preliminary)

10

F.Roncarolo, LHC BOC, Mar 2011 11

CONCLUSIONS

WS •40 MHz operational•Absolute calibration to be studied•Need TS to investigate noise on B1 WS H and V

BSRT •automatisms for gain, focusing, steering almost all done, stability to be tested•absolute calibration to be studied •Bunch-to-bunch scans not automatic, need some more effort BI and OP•FAST camera (bunch-to-bunch, turn-by-turn) commissioning hopefully after TS

MD requests•ramp 1.38TeV (includes AGAP and LDM)•WS-BSRT cross-calibration•WS response to PM gain/ filters•Emittance preservation

General•Check beam optics at monitors