The Alice-ToF HV system and the PVSS control system

E. Scapparone for the Alice-Tof group

DCS Workshop, June 16

- The ToF High Voltage layout ;

- Component selection and adopted solutions;

- PVSS work started !

- 18 sectors ( 20o tilted )- 5 modules/sector- from 15 to 20 strips/sector- HV ranges +(-)7.5 kV ( but the system can hold up to 15 kV).

MRPC Module

Dis

trib

utor

sD

istr

ibut

ors

40 m

-+

7.5 kV

7.5 kV

SY1527(+)

SY1527(-)

40 m6m

6m

90 + 90 HV channels

HoneycombHoneycombPlanePlane

Distributors

HV+

HV-

Vetronite orglass cylinder

Solderedconnections

Strip 3

Strip 4

Strip 1

Strip 2

HV system by CAEN: SY1527, 16 (6 ch , 7.5 kV) modules. First modules ready on July

(+ few spare modules with 15 kV to feed asimmetrically few strips.)

Single width

SY1527 (+) SY1527 (-)

Cable: by Kerpen (3-polar, 15 kV)

Halogen free, flame retardant

shield

FL GND

HV

9.4 mm

cable

Nickel coated

Connectors by CPE:

A prototype of the Kerpen cable equipped with these 3-polar connectors ready, just tested.

-The HV Control PVSS based just started , taking advantageof the HMPID group help.

-At the moment, PVSS Version 2.12 + Framework 1.2, running on W2000.

- First choice of the Detector view