CONSOLIDATION CPS-BL SYSTEM

V. Prieto Hermosilla AB/BI/BL

CPS_BL SYSTEM

OUTLINE

I. The CPS BL Monitoring systemII. FunctionalitiesIII. Main ProblemsIV. New Options: LHC-IC Test on PSV. Planning

CPS_BL SYSTEM

PS LAYOUT

Injection: 6

Booster:32 (2 SECTORS)

Transfer:10

ISOLDE:10

PS:100(4 SECTORS)

TT2:8

nTOF:1

AD:2

TOTAL BL: 164

CPS_BL SYSTEM

PS BEAM LOSS• ACEM (Al Cathode Electron

Multiplier Tube)• Isat=100A (Average anode

current)(6.107particles in the ACEM/10ms)

• Integration mode (fixed Gain)+ADC

• Integration mode +Analog acquisition. (OASIS)

• -800V<Vp<-1100V • Video (display 8 bits) +

Survey (read out 12 bits using 8MSB, every 100ms)

CPS_BL SYSTEM

MAIN PROBLEMS

• Old system: 1980.• Performance limited by the electronics.• No spares for electronics/detectors.• Obsolete CAMAC Racks.• Every detector has to be dismantled and

calibrated every year.• Non standard system: different from SPS and

LHC.

CPS_BL SYSTEM

SPS (LHC) BEAM LOSS

• Ionization Chamber• N2 filled• Vp=800V (1500V)• SPS integration mode (Variable Gain)

+ADC(15 bits)• LHC no gain change• Survey

CPS_BL SYSTEM

LHC-IC TEST ON PS• Two chambers installed on the S16 of the PS (August 2007)

• One in parallel with the beam pipe.

• One perpendicular to the beam pipe, on the magnet.

• Data taken to compare it with the actual BL system (with the same electronics or directly).

• New position needs to be decided

CPS_BL SYSTEM

FIRST RESULTS

IC1&IC2 (Direct measurement)

IC1 vs. IC2

-1

0

1

2

3

4

5

6

7

8

9

-0.000005 0 0.000005 0.00001 0.000015 0.00002 0.000025

time (s)

Volts

(V)

IC1IC2

CPS_BL SYSTEM

FIRST RESULTS

IC1&IC2 (LHC electronics)

Electronics saturated

CPS_BL SYSTEM

FIRST RESULTS

IC vs. ACEM with PS electronics

IC vs. ACEM

-10

-8

-6

-4

-2

0

2

4

6

-0.6 -0.4 -0.2 0 0.2 0.4 0.6

Time (s)

Int.

Out

(V)

IC1IC2ACEM S16ACEM S31

IC2 vs. ACEM

-0.005

0

0.005

0.01

0.015

0.02

0.025

0.03

0.035

0.04

0.045

-0.000005 0 0.000005 0.00001 0.000015 0.00002 0.000025

Time (s)

I(A)

IC2ACEM

ACEM saturated.Imax=0.1mA

IC vs. ACEM (direct current)

CPS_BL SYSTEM

NEW SYSTEM

• Signal Cables: re-used with adaptors.• HV Cables : re-used (Main distribution

changed on 2006)• Electronics: new (studies starts in March)• Detector: new (LHC type)• Mechanics: new (LHC type)

CPS_BL SYSTEM

PLANNING• We are going to install and test:

– 8-16 IC’s in the PS.– LHC Electronics and Software in the b.368.

• The threshold comparator program and the combiner program needs a modification but the Technical specification document has to be done before the software modification.

• The studies for the new electronics start in March.