status of the active and passive radiation monitoring systems federico ravotti (ph/tot) totem...

Status of the Active and Passive Radiation Monitoring Systems

Federico Ravotti (PH/TOT)TOTEM Collaboration Meeting

18 March 2009

F. Ravotti-Status of Active/Passive RadMon 2

Contents

• Active RadMon SystemDedicated electronics and cabling integrated into the DCS

– Review and Implantation in the experiment;

– Status of the system components;

– Results of the Pilot System (Sep.-Nov. 2008);

– Control Software and Integration in IP5;

• Passive RadMon SystemSet of samples which do not need readout electronics

– Review of passive dosimeters used in TOTEM;

– Passive RadMon units;

– Implantation and Bill of Materials;

• ConclusionsTOTEM CM – 18 March 2009


Active RadMon

TOTEM CM – 18 March 2009

IRAD

IFET

RRADRRL

p-JFET

124

ELMB-DAC PatchPanel

RadMonSensor

VRAD

VRL

ELMB

dose/fluence/temp.

read. current

ELMBRadMon Box


Active RadMon Implantation


Co

un

ting

roo

m (U

SC

55

)C

ave

rnT

un

ne

l

ELMBRadMon

ELMBvacuum

ELMBT SiD

ELMBT cooling

ELMBT CSC

ELMBT GEM

ELMBRadMon

ELMBRadMon

ELMBothers

ELMBothers

<PCname>

PVSS IIPVSS II

sysWORXX

ELMB OPCserver

OPC client

PS 12V

PS 12V

PS 12V

PS 12V

PS 12V

PS 12V

PS 12V

PS 12V

PS 12V

PS 12V

PS 12V

PS 12V

R-PPR-PP R-PP

PS 30V

PS 5V

HV-PP

UPS pow er CMS pow er

T1Roman Pots T2

ISC PT-100

humiditypressure

ISC

8

PT-100

humiditypressure

ISC

24

vacuum PT-100 PT-1000

168

56 28

ELMB readout

P-PP H-PP P-PP H-PP

PS 30V

PS 5V

PS 5V

bus08 bus04

bus12

T1 T2Pressure

RadMon DAC

PS 30V

RadMon

RP

4R-DAC R-DACR-DAC

4

2

1

8

8

4

42

2

1 ELMB + 2 DAC + 2 PP = 6 ISC


RadMon ISCs & ELMBs


• 7 ELMBs for RadMon within the

batch of the DCS (Fernando);

• ELMBs configured for “non-

standard” CAN-bus data transfer

mechanism: on-demand SDO

(usually: synchronized PDO).

• 2 RadFETs (TID); 2 p-i-n diodes (Feq); NTC:

RadFETs: ~ 100mA x 1000 ms

p-i-n diodes: 1mA x 700 ms

• All 36 ISCs produced & characterized at the end of 2008 by PH/DT;

• 2 in RPs @ 220 mt, 1 in T2 ¼ so far;

• PH/DT manages the stock of spares for LHC experiments.


ELMB-DACs


11V diode replaced

with5V diode

• NIKHEF Project (2002), ATLAS (2006)

• New production TOTEM/LHCb (2008)

• 2 Prototypes with wrong Zener diode

• 40 DACs produced and tested

• 34 OK (3 damaged & repaired) – 6 BAD

• 14 + 6 spares for TOTEM + left PCBs ...

• Each of 16 ch./DAC individually calibrated

with test bench in lab. 555 running PVSS

and data analysis program (William)

VE = 30V


ELMB-DACs Testing


I-V curves in the range 0-20 mA for the 12 sensor Ch. each of the 4 switch Ch.

ISC 1 ISC 2

ISC 3

NTC currents are not perturbated during DAC operation

Load

1.3

kW

to s

tay

with

in th

e V

rang

e <

30 V


PatchPanel (PP) boards


• ATLAS PP for 6 ISCs hosting 2 rad. sensors +

NTC (2005)

• Design of TOTEM/LHCb PP for 3 ISC hosting

4 radiation sensors + NTC (2008)

• 2 Prototypes + 36 Produced (Johan)

• Production inspected and tested (Josef)

• 35 OK (few scratches on signal lines t.b.r.)

• 1 Discarded (big blisters on PCB surface)

• 14 + 4 spares ready for TOTEM

ISC 1 ISC 2 ISC3 Spares


RadMon Pilot Setup Sep. 2008


Rack S2B02ELMB+DAC+PP

Final PSs chosen for RadMon and all DCS

CAN Bus

Rack S2B19Laptop with PVSS & CAN-USB

• Practice made on ATLAS-Ljubljana prototype in Lab. 555 (Nov. 2007-Sep. 2008)

• Pilot setup of our readout installed in USC55 from Sep. 8th to Nov. 2008

F. Ravotti-Status of Active/Passive RadMon 10TOTEM CM – 18 March 2009

PMIL 5314 (RAMSES)TOTEM RadMon 50

PMIL 5312 (RAMSES)

PMIL 5714 (RAMSES)TOTEM RadMon 51

PMIL 5712 (RAMSES)

B1

B2

Monitors layout in the Tunnel

RAMSES monitors also integrated into DCS

RadMon 51 (POT2)

Ramses

~ 5 mt.


Radiation @ TOTEM “week 1”



Result RadMon Pilot Setup


We could reproduce the Tc of all sensors @ 300 mt. (here Tc = ~ 25 mV/C)


What else did we learn ?


I Max = 18kA

• CMS mField does not induce noticable changes (after proper grounding);

• Test and debug the PVSS control function with > 35‘000 readout cycles.

• Grounding of the Power Supplies;

• Temp. behaviour on the RPMB in function of cooling conditions (det. OFF: T~13C while T(Si) =-35C)


RadMon Control Software


• RadMon ELMBs use different data handling;

• Prototype of PVSS ctr. function developed & tested:

now used in the RPMB Test Panel of Lab. 555 (Ivan)

• Sizable work for the DCS team (D2-to-D5);

• Sequential readout of 3 ISCs (1 PP board) in ~ 30s.ISC1

SW OFF NTC SW ON READ sens. & curr. SW OFF

ISC2

SW OFF NTC ...

• Needs to be integrated in the global DCS structure;

• Proper logic to be fully defined and implemented.


HW Integration in IP5

• Cabling:– USC55:

• RPs: all OK, 1 connector/ISC (Antoine);

• T1/T2: all OK with SUB-D’s Adaptation needed

– Missing: Connectors and “short cables” @ RP 147 mt.

• DCS Rack:– RPs: “ELMB Box” is being assembled and cabled (Johan);

– T1/T2: mechanics ready, “ELMB Box” to be assembled.



Passive RadMon

• Complementary/Redundant Radiation Measurements;• Passive sensors needs to be removed for readout;• WG started as common project for LHC Experiments (2004);• Since then …

– ATLAS: samples from different institutes;– ALICE: ?– CMS/ATLAS-ALFA: samples from DESY;– LHCb: exploited the WG outcome.


TLD PAD (Alanine)

RPL BPW

Dose Range

10 mGy to 100 Gy

10Gy to 1MGy

100mGy to 100 kGy

2x1012cm-2 to 4x1014cm-2

Readouttechnique

Heating; Light emission

ESR UV; Light emission

Voltage measurement

TOTEM

RadFET TLD Alanine RPL1E-04

1E-02

1E+00

1E+02

1E+04

1E+06

1E+08

Dosimeter typeD

ose

(G

y)


Passive RadMon Unit


MTS -N natLiF:Mg,Ti

MCP-7 7LiF:Mg,Cu,P

MTS -7 7LiF:Mg,Ti

MCP-7 7LiF:Mg,Cu,P

Courtesy: Ch. Ilgner (LHCb) PE box

p-i-n diode BPW

TLDs

INB: xxxx00010132000xxxx

Sensitive to different spectrum components


Location and Bill of Materials


• 50 PE housing produced by the Dortmund TU obtained via LHCb;

• 40 TLDs out from the agreement LHCb-IJF, Krakow, Poland (includes readout).– 40 units destined to TOTEM: “fresh” samples for 2009 run on the way for replacement;

• 36 p-i-n diodes from PH/DT;

• > 100 Alanine & > 70 RPL from CERN DG/SCR2 mounted on RPs. All the rest under assembly (Antoine);

readout/replacement instructions, INB numbering, ... TOTEM-RAD-002.


Documentation



Conclusions

• Active RadMon System– All components were procured/produced;– Pilot Setup validate the design/allowed extensive tests;– Control Software needs to be integrated in the DCS;– Final HW needs to be integrated in IP5;

• Passive RadMon System– All sensors were procured for experiment startup;– All passive units are available for installation.


status of the active and passive radiation monitoring systems federico ravotti (ph/tot) totem...

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