1

CKOV1 at the MICE Experiment

•CKOV1 to perform mu/pi id w TOF0/TOF1.•Progress since CM16•CKOV1 Fabrication and Installation

TOF0 CKOV1 TOF1 EMCALTOF2

L. Cremaldi, CM17 CERN, Feb 24, 2007

2

2 Threshold Aerogel Counters2 Threshold Aerogel Counters

Aerogel Counter

L. Cremaldi, CM17 CERN, Feb 24, 2007

3

A

B

C

ISIS Beam Line ISIS Beam Line

4

Magnetic Shielding- 2D Model

9.4%

4.6% 3.4%

3.3%

58%

48% 41%

17%

Btube = 10%BZ + 60% BBZg , B <5g

BZ

B

L. Cremaldi, CM17 CERN, Feb 24, 2007

5

- H20 fraction is negligible.- Tested with low energy betas.- Background may be dominated by-rays, etc.

L. Cremaldi, CM17 CERN, Feb 24, 2007

6

QuickTime™ and aTIFF (Uncompressed) decompressor

are needed to see this picture.

Rate Tests

L. Cremaldi, CM17 CERN, Feb 24, 2007

7

Rate Tests

L. Cremaldi, CM17 CERN, Feb 24, 2007

8

Number of Photo Electrons vs Frequency

0

10

20

30

40

50

60

70

0 1000 2000 3000 4000 5000 6000 7000

Frequency (kHz)

# of PE

8in 5PE8in 10PE8in 15PE8in 20PE8in 25PE5in 5PE8inTB

Transistor base prototype

Resistive base

RCA 8854 Transistor base

L. Cremaldi, CM17 CERN, Feb 24, 2007

9

Transistor Base Transistor Base

L. Cremaldi, CM17 CERN, Feb 24, 2007

10

CKOV1 Electronics

•CAEN V1724 8 Channel 14 bit 100 MS/s FlashADC 250-500 ps t resolution•CAEN V1290 TDC 25 ps t resolution

20 ns.div

L. Cremaldi, CM17 CERN, Feb 24, 2007

11

-Machining- UM-Nickel Plating-Ready in Spring '07 for light tests

Light Box AssemblyLight Box Assembly

L. Cremaldi, CM17 CERN, Feb 24, 2007

12

-Needed June/July ‘07.-Aerogel order in Mar’07-4mo lead time?-Assembly in Mississippi-Ship to RAL in Jul ’07

Radiator Box AssemblyRadiator Box Assembly

L. Cremaldi, CM17 CERN, Feb 24, 2007

13L. Cremaldi, CM17 CERN, Feb 24, 2007

- CKOV1 Platform Design-GG -Decision should be made if RAL or US responsiblity.

14

-Magnetic shields and PMT assemblies from Treste.-Mu-metal shield needs modification and re-annealing.-10 PMTs checked at Trieste before shipping to RAL. (UM)

PMT + Shield AssemblyPMT + Shield Assembly

L. Cremaldi, CM17 CERN, Feb 24, 2007

15

Mirror Flashing Concept Mirror Flashing Concept

•Mirror aluminized in 2 sections.

•Large Vacuum vessel.

16

Mirror Fabrication

•CERN Facility - Andre Braem - meeting next week•FNAL Facility - Eileen Hahn - Lab7

Large Vacuum Chamber- Off Line.Small Chamber- On Line.

90cm id

38cm id

L. Cremaldi, CM17 CERN, Feb 24, 2007

44cm id

60cm od

17

quartz fiber PMT

DAQGate

LED Pulser

LED Pulser•Non-linear Response•Sensitive to LED Vapp•Adequate for Monitoring•Calibration of 1-Photon

•LEDs mounted near PMTs•Pulser fanned out at CKOV1•Two BNC control lines.

VME/NIMPULSER

L. Cremaldi, CM17 CERN, Feb 24, 2007

18

Alignment & Self Calibration - 1,2 PE most probable in PMT 1-4.- Small correlation with muon x,y.- Data 1,2 pe signals self calibrating- Some Alignment of CKOV1 by balancing PMT light yield.

L. Cremaldi, CM17 CERN, Feb 24, 2007

19

CKOV1 Services - 12 45m signal cables RG-58 type. 8 CKOV1 signals 2-Pulser 2 spare Should terminate at a patch panel in the Control Room.

- 10 SHV type high voltage cables. - HV supply not specified yet, may start with something simple Lecroy 4032??

-4 Low voltage Monitor cables for humidity sensor, gas flow, etc

-Dry air supply for mirror box or silica gel packs.

- NIM Crate for Pulser and checkout.

ckov1

Contr

Room

45m

20

CKOV1 ScheduleCKOV1 Schedule

Mar Apr May Jun Jul Aug Sep Oct ‘07

Light Box

Aerogel Order

Mirror

Assemble

PMT Check + Housing to RAL

PMT Bases(FNAL)

Radiator Box

Mirror Assembly

Nickle Plate

CKOV1 Stand (RAL)

Mu-metal Shield Mod(??)

L. Cremaldi, CM17 CERN, Feb 24, 2007

Radiator Box

21

Hardware/Software Experience

•TOF + CKV systems installed by hardware experts. H2 Testbeam CERN

• User analysis by software experts FNAL.

•Specialization, wave of the future!

L. Cremaldi, CM17 CERN, Feb 24, 2007

22

Full Scale Model of the Royal Crown

L. Cremaldi, CM17 CERN, Feb 24, 2007