S. Zelepoukine CMS Electronics 2003 1 Status Report: ECAL Detector Control System S. Zelepoukine IHEP Protvino/ETHZ 28.3.2003

S. Zelepoukine CMS Electronics 2003 1

Status Report:ECAL Detector Control

System

Status Report:ECAL Detector Control

System

S. ZelepoukineIHEP Protvino/ETHZ

28.3.2003


OutlineOutline

• Precision temperature monitoring• Humidity monitoring• Temperature safety system (TSS)• Preshower• Software (PVSS)• H4 testbeam 2003• Bld.867, DCS lab, other activities• Conclusions


Precision temperature monitoringPrecision temperature monitoring

• monitor temperature stability (thermal screen, grid).

• precision required : at least 0.01 deg (relative).

• sensors: Betatherm Thermistors (NTC) — approx. 500 (EB+EE)

• sensor location (in a SM, similar in EE quadrant):• grid — 1 sensor in each module; • thermal screen — 1 sensor in each module; • IN/OUT cooling pipes — 2 sensors per SM.

Total: 10 sensors per SM (EE quadrant)

• readout (several options are considered):• Keithley multimeter with/without a remote transducer;• ELMB with/without a remote transducer (a backup solution).



Status — sensor probes:

• Exact sensor location is defined (symmetrical in SM).• Sensor probe design is finalized (grid + thermal screen).• Immersion probe for In/Out cooling pipes:

OK for SM0 (F.Mossiere); To be defined for SMx.• Sensor installation procedure:

• defined for the thermal screen;• to be defined for the grid and In/Out pipes.

• Sensor cabling inside SM:• use flat cable (or single twisted pairs);• reconsider patch panel connector (crimped / IDC ?).

• Preliminary offers obtained : ~ 10 CHF per sensor (factory pre-calibrated!)



Sensor positioning on the thermal screen

SM0

SM1, ...

SM0, ...

Sensor positioning on the grid



Sensor positioning on cooling pipes (immersion probes)

F.Mossiere, EST/ME


Temperature probe (V.3)Temperature probe (V.3)

10 mm

17 mm

10 mm

2x holesdiameter = 3 mm

Temperature probesto be installed on the thermal screen and on the grid.Material — aluminium alloy;

therm.conductivity k = 170 W/m*K

Screws (2.5mm)

Alumin. plate10 mm

section


Temp.probe – finite element model

Temp.probe – finite element model

Delta T = 1 K(plate – air)

Delta T = 0.06 mK(sensor location)

A.Riabov (IHEP, Protvino)



• Status — readout:• ELMB will still be used for the setup in H4 / Bld.867.

In the meantime, Keithley [+ T-MUX] options are to be tested.• Transducer (T-MUX) is under development:

T-MUX = analog multiplexer + RBFE ASIC (LHC/ACR)• Non rad-hard MUX (Maxim) irradiated at PSI (Dec.02), see CMS Int.note;

Results are negative for high rad.doses (>10 years inside ECAL):parameters are not stable enough for required precision.Can still be considered if placed on the balcony and periodically replaced.

• Rad-hard MUX (EP/MIC) considered to be used for the second T-MUX version. For this I2C remote connection has to be implemented.

• Prototype PCB is produced at IHEP (Andrei Sidorov, IHEP); should now be assembled and tested in the lab — no irradiation testing required.

• Keithley tests in the lab (Alison Lister, ETHZ)• long cables (~ 100m) — switching rate, noise effects;• 2-wire / 4-wire sensor connection.



Switching_ 2_ point, integration time= 0. 5sSwitching_ 2_ point, integration time= 0. 5s

Keithley measurements: 2-wire connection, long cable

Alison Lister, ETHZ

0.01Ohm


Humidity monitoringHumidity monitoring

• Collaboration with CMS Tracker DCS (A.Tsirou) for sensor study and selection. Also, sensor electronics.

• Several types of sensors being tested in the Tracker lab.

• New sensors from Hygrometrix at medium price (~ 15 CHF).

• Irradiation tests at PSI will start soon (in 1-2 weeks).

• Non rad-hard sensors will be used in H4 setup(to obtain experience; provide input for integration).


Temperature Safety System (TSS)Temperature Safety System (TSS)

TSS (VINCA, Belgrade):

• Preparing for SM0, SM1.(to be defined: exact sensor location, probe construction)

• The same functionality as at M0’ (interlocks).

• RBFE based board — testing is in progress in Belgrade.


Temperature Safety System (TSS)Temperature Safety System (TSS)

Prototype PCB is under test — RBFE + multiplexer for 8 channels


PreshowerPreshower

DCS for Preshower:

• Preshower DCS will not just cover cooling control and

temperature monitoring, but also safety monitoring.

• NCU Taiwan will take up the DCS for preshower. • Manpower: Apollo Go and Chia-Ming Kuo.

• Started to look into using PLC's (Apollo) and soon PVSS (Ming)

• Made some cost estimate (Dave Barney)

• Study of cabling (Piet Wertelaers)

• Will soon write a specification document (Apollo and Dave)


SoftwareSoftware

• Software developments (Alison Lister, ETHZ):

• working on Supervisory System (FSM);• HV application;• Cooling system application;• Plans to implement LV application;• studying methods to access non-PVSS database.

• Igor Lobov just has started with PVSS at IHEP, Protvino.


SoftwareSoftware

Temp 1 [C]

Temp 2 [C]

Temp 3 [C]

Temp 4 [C]

Temp 5 [C]

Temp 8 [C]

Temp 6 [C]Temp 7 [C]

Water Res 14 [Ohms/m^2]

5 kW in Beam

0.5 kW Preparation

Pressure diff 9 [bars]

Flow Meter 13 [l/s]

Flow Meter 12 [l/s]

Flow Meter 15 [l/s]

Valve Opening 10 [%]

Power 11 [W]

Open Alarm Panel

P

3/24/200:39:32 A

15.5

17.2

17.8

18.0

18.0

19.0

18.019.0

1.00

1.50

0.3

1.40

0.74

14.5

18 18.0

T3 - T5 vs. Power 11

T2- T1 vs Valve_Opening 10


F15 vs Valve_Opening 10

T7-T6

(T7-T6)*Flow12

Temp 1 [C]

Temp 2 [C]

Temp 3 [C]

Temp 4 [C]

Temp 5 [C]

Temp 8 [C]

Temp 6 [C]Temp 7 [C]

Water Res 14 [Ohms/m^2]

5 kW in Beam

0.5 kW Preparation

Pressure diff 9 [bars]

Flow Meter 13 [l/s]

Flow Meter 12 [l/s]

Flow Meter 15 [l/s]

Valve Opening 10 [%]

Power 11 [W]

Open Alarm Panel

P

3/24/200:39:32 A

15.5

17.2

17.8

18.0

18.0

19.0

18.019.0

1.00

1.50

0.3

1.40

0.74

14.5

18 18.0

T3 - T5 vs. Power 11



F15 vs Valve_Opening 10

T7-T6

(T7-T6)*Flow12

PVSS Panel for

Cooling Unit:


H4 testbeam 2003H4 testbeam 2003

• Finishing sensor installation — SM0; testing in Bld.27 (?)

• Preparing sensor readout (ELMB + CANbus) and PC in H4

• Integration of PVSS applications

• Provide the “PVSS — data acquisition system” interface

• Support the Endcap EE0’ tests in H4 — use same setup (?)


Bld.867, DCS lab, other activitiesBld.867, DCS lab, other activities

• A setup needs to be defined to support DCS related activities in Bld.867(all sensors must be verified for proper operation after installation).PC/PVSS + ELMB ?

• DCS lab is now existing! Bld.892-R-B11Concentrate all hardware related work there (probe production, testing,readout electronics testing, sensor calibration, etc.).

• Sensor database has to be created and maintained.


ConclusionsConclusions

• Sensor installation is close to the final solution(sensor location, probes, cables, connectors)

• Temperature sensors/probes — preparing for production.

• Humidity sensors should be selected soon — based on irradiation tests at PSI.

• Sensor readout still to be defined from several options under consideration and testing (T-MUX, RBFE, Keithley, ELMB).

• Will concentrate on readout and CMS integration after the sensor installation work on SM0 is completed.

• Software developments — good progress.


Backup slidesBackup slides


Temp.probes in cooling pipesTemp.probes in cooling pipes

F.Mossiere, EST/ME


Temp.probes in cooling pipesTemp.probes in cooling pipes

F.Mossiere, EST/ME


Temp.probe : finite element modelTemp.probe : finite element model

0.06 mK


Temp.probe : finite element modelTemp.probe : finite element model

Documents

S. Zelepoukine CMS Electronics 2003 1 Status Report: ECAL Detector Control System S. Zelepoukine IHEP Protvino/ETHZ 28.3.2003