Construction and Installation Readiness of TOTEM Roman Pots

DetectorsFederico Ravotti (PH/TOT)

Gennaro Ruggiero (PH/TOT)LHCC minireview – 06 May 2009

• Layout of the Roman Pots (RPs) system;

• Construction steps of the Detector Package;

• Readiness of the RP services.

2

Summary

Experimental layout of the TOTEM Detectors

Services routing:From Castor to Racks

Patch Panels

T2

Services routing:From Castor to Racks

Patch Panels

T2

Roman Pots at147m, 220mfrom the IP

T1

T2

Services routing:From Castor to Racks

Patch Panels

T2

Services routing:From Castor to Racks

Patch Panels

T2

T2CMS

T1

Inelastics Telescopes

IP5

3

Roman Pots at147m, 220mfrom the IP

Horizontal Pot Vertical Pots BPM

Roman Pot (RP) Unit

10σ beam

Detectors overlap in the data taking

position

Special beam pipe insertion allowing to approach the detectors very close to the beam. Compensation system allows the movement from garage position to data taking position.

2221

150m thin window

5

All 8 RP Units installed in the LHC since autumn 2007

Station 220m

Station 147m

2 Mechanical units = 1 Station

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The Detector Package (DP)

The Si microstrip edgeless detector

The “Champignon”VFAT chips

Si microstrip edgelessdetector

The Hybrid

5 u & 5 v oriented planes

Kapton pigtail

CE07support

plate

Connectors to detector hybrids

Roman Pot Motherboard

The RP Motherboard links the front-end to the counting

room. Preliminary tests in the TOTEM Lab. Bld. 555.

RP Motherboard and its mezzanines

7

DP production takes 30 days (3 DPs produced in parallel)

RP hybrid box with traveller

sheet

RP Production DB interface

The RP hybrid test and assembly data are kept on a Database and on the traveller

sheet.

8

PCB of the RP hybrid

Cards delivered by EN-ICE are inspected and then the VFATs

are mounted in the bonding lab.

9

RP hybrid test setupThe RP hybrids together with the VFATs are tested with the Totem Test Platform (TTP).

Totem Test Platform (TTP) 10

RP hybrid with VFATs and sensors all wire-

bonded

Pre-qualified Edgeless Silicon sensors are mounted and wire-

bonded in the bonding lab. Then the sensors are tested with the TTP.

11

Computer Measuring Machine (Bonding Lab)

The support bars are precisely mounted on the hybrid. The

hybrid is connected again to the TTP for a test of the VFAT +

Silicon sensor

RP hybrid fully mounted with support bars

12

The Detector Package is assembled. The DP is tested together with the Motherboard in the Lab. Bld. 555. DCS tests are also executed here.

RP Detector Package and its

Motherboard

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RP DP checked in the Lab. Bld. 555

The DP and it’s Motherboard are assembled together with

the “Champignon”. A final check is then made.

RP Detector Package with the

Champignon

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RP DP inserted in a prototype pot with thin window

The RP Detector Package is inserted in a prototype pot with thin window

and installed in a test setup in H8 for data taking. The H8 setup allow test with cosmic-rays or the SPS beam.

15

During summer 2008, the first 2 detector packages were installed

in the tunnel, in the horizontal Pots of the “far” units at 220m. on

both sides of IP5.

Open pot in the tunnel

16

Package ready for installation

Package installed(Sec. 5-6, station 220m., far unit, hor. pot)

17

POT 3 to POT 7 installed during 29-30 April 2009 in the RP Station 220m Sec. 5-6 as

planned!

Station 220m in Sec 5-6 is

now completed!

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Roman Pots Services Layout

LV Power Supply Remote

Units

VacuumSystem220m

Cooling Plant

VacuumSystem147m

DCS: Motorization + High Volt. + Low Volt. Control Modules + Environmental Sensors Readout

XRP1(TOTEM)

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Cabling / Installation of Power Supplies

Cabling

• Stations 220m. completed;

• Stations 147m. under completion.

Low Voltage Power Supplies

• Control Units in USC55 are installed;

• Remote Units in RRs are installed.

High Voltage Power Supply

• Crate installed in USC55;

• HV Patch Panel in assemblyHV (CAEN)

LV (Wiener)

Patch Panel in the tunnel

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Cooling and Vacuum

Cooling System (EN-CV)

• Cooling Plant operational;

• Loops for 220m stations completed

and tested;

• Loops for 147m stations completed

and under test.

Vacuum System

• All installed RP detectors under

vacuum (~ 10mb). Vacuum needed

to avoid condensation and to reduce

stress at the window.

Cooling Plant(compressors)

Cooling Plant (tank)

RP Station Vacuum System

Environmental Sensors Readout

Vacuum & Temperature Box (RP) installed at IP5

RadMon Boxes (RP/T1+T2) under test in Lab. bld. 555

Panel for RP Control (IP5)

FSM

Silicon

Detectors

Control

Motor

Control

DCS

Monitoring

23

Thank you for your attention.

Many thanks to all TOTEM colleagues that supply the material for this presentation

Pinout tables: full connectivity chain from HW (HV/LV/Temp/RadMon/...) to DCS,Mapping single wires into control/monitoring functions

PBS of detector

Cabling

Counting Room PPs

DCS PVSS

datapoints

DATAPOINTS NAMES & PVSS IMPLEMENTATION

AUTOMATICALLY DONE

RP Panel for Motherboard + Detector Package tests in Lab. 555

HV

Monitoring

LV

Vacuum

HV Control

RadMonTemp.

Hybrids

Temp.

Cooling Lines

Problem Encountered …

• Absence of the technician for the assembly (now 2 technicians);

• Delamination of the Hybrids (improved controls);26

Production History RP Station 220m. Sec. 56