Status of ID sonar developments Greg Hallewell Centre de Physique des Particules de Marseille

Status of ID sonar developments

Greg Hallewell Greg Hallewell

Centre de Physique des Particules de MarseilleCentre de Physique des Particules de Marseille(CNRS/IN2P3)(CNRS/IN2P3)

ATLAS ID week, CERN, October 28th - November 1st 20131

R. Batesa, M. Battistinb, S. Berryb, J. Berthoudb, A. Bitadzea, P. Bonneaub, J. Botelho-Direitob, N. Boussonc, G. Boydd, G. Bozzab, E. Da Rivab, C. Degeorgee,

C. Deterref, B. DiGirolamob, M. Doubekg, D. Giugnib, J. Godlewskib, G. Hallewellc, S. Katuninh, N. Langevinc, D. Lombardb, M. Mathieuc, S. McMahoni, K. Nagaij, E. Perez-Rodriguezb, D. Robinsonk, C. Rossil, A. Rozanovc, V. Vacekf, M. Vitekf

and L. Zwalinskib

a SUPA School of Physics and Astronomy, University of Glasgow, G62 7QB, UK b CERN, 1211 Geneva 23, Switzerlandc Centre de Physique des Particules de Marseille, Aix-Marseille Université, CNRS/IN2P3, 163 Avenue de Luminy, 13288 Marseille Cedex 09, France d Department of Physics and Astronomy, University of Oklahoma, Norman, OK 73019, USA e Indiana University, Department of Physics, 727 East 3rd St. Bloomington, IN 47405, USA f Deutsches Elektronen-Synchrotron , Notkestraße 85, D-22607 Hamburg, Germanyg Czech Technical University in Prague, Department of Applied Physics, Technická 4, 166 07 Prague 6, Czech Republich B.P. Konstantinov Petersburg Nuclear Physics Institute (PNPI), 188300 St. Petersburg, Russiai Rutherford Appleton Laboratory - SFTC, Harwell Oxford, Didcot, OX11 OQX, UKj Department of Physics, University of Innsbruck, Innrain 52, 6020 Innsbruck, Austriak Department of Physics and Astronomy, Cavendish Laboratory, J.J. Thompson Avenue, University of Cambridge, CB3 0HE, UK l Department of Mechanical Engineering - Thermal Energy and Air Conditioning Division, Università degli Studi di Genova Via All'Opera Pia 15a - 16145 Genova, Italy

ATLAS ID week, CERN, October 28th - November 1st 2013 2

Sonar (speed of sound) measurements used for the analysis of binary gas mixtures

of dissimilar molecular weight, including C3F8/N2, C3F8/C2F6 & C3F8/air

in the ATLAS pixel & SCT cooling system – soon also CO2/N2 for the IBL


Sound transit times measured in opposing directions in flowing gas provide simultaneous

flow measurement in the same instrument

Precisions: (<0.1%)C3F8/N2 ~4.10-5: C3F8/(25%)C2F6 ~3.10-3:C3F8/(010%) air ~ 10-3: (<0.1%)CO2/N2 ~ 5.10-4 (expected)

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Using Polaroid/SensTech model 6000 camera/robotics 50 kHzultrasonic transducer.

May need to go to acoustic frequencies (1-4 kHz) & conventional loudspeakers

for gases with high CO2 content

Custom microcontroller-based electronics sends sound pulses & measures transit time

in two opposing directions, along with process gas temperature & pressure


Environmental N2 envelope gas from pixel & SCT detectors is aspirated into sonar tubes for

sound velocity analysis.

(instruments & SCADA computer running PVSS in USA15 gas room)


NO

NC

P (01 barabs)

Vacuum pump(membrane)

P (0 1 barabs)

P (0 1 barabs)

P (0 1 barabs)

Pixel

Pix

el

SC

T

SCT

TR

T/I

BL

TRT

To mobileGC




To air extraction system

Future Acoustic

frequencysonar

(1-4 kHz)

IBL




To mobileGC

To mobileGC


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Vac pump driver - version 2

Valve driver

Sonar chassis (sonar tube 1+ analog inputs, temp + press.)

Sonar chassis (tube 2- sonar only, no A.I.)

Dell Poweredge 1950 on ATLAS general network will soon be replaced by new

R610 server on ATCN network(already installed:

OS uploaded via ATCN)

PVSS projects will soon be migrated onto the new R610 for testing


Example PVSS-v3.8 Graphical User Interface: one sonar tube + linked temperature sensors


We have been analyzing pixel NWe have been analyzing pixel N22 environmental gas environmental gas for Cfor C33FF88 leaks for more than 18 months ( leaks for more than 18 months ( Feb 2013) Feb 2013)

Pixels: Pixels: ~70~70 independent C independent C33FF8 8 evaporative cooling circuitsevaporative cooling circuitsLeaks in certain circuits of « L2 » (barrel: layer 3)Leaks in certain circuits of « L2 » (barrel: layer 3)


Results from long term (> 18 month) study of pixel NResults from long term (> 18 month) study of pixel N22

environmental gas for Cenvironmental gas for C33FF88 leaks leaks%

co

nce

ntr

ati

on

of

C3F

8 in

N2 (

mo

lar)

)


Identification of cooling circuits with C3F8 pleaks during pixel detector cooling restart: 15 January 2012

(re-confirmed during shut-down 20 February 2013)


We also analyzed SCT NWe also analyzed SCT N22 environmental gas environmental gas for Cfor C33FF88 leaks for 2 months ( leaks for 2 months ( Feb 2013) Feb 2013)


SCT and pixel detectorcooling shut-down 20 February 2013.


Sound velocity measurement uncertainty c= 0.05ms-1

Total from effects: (temperature, pressure, distance between transducer membranes, transit time measurement)

Mixture measurement precision mix = cm

m = local gradient of curve (c vs. conc. C2F8 in N2)

(0.05ms-1/12.27ms-1%-1) 0.004% (0≤%C3F8 ≤ 1%)

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Analysis of CO2 leaks from IBL staves into N2 atmosphere

Membrane: separation of IBL N2

atmosphere from that of the rest of

the pixel detector

82nd Sonar Meeting, CERN, October 16th, 201315

Slope = 1.1 ms-1%-1

Mix. resolution for sound vel.measurement uncertainty

of 0.05ms-1 0.05%

MW CO2 = 44: MW N2 = 28

16ATLAS ID week, CERN, October 28th - November 1st 2013

Sonar installations for theNew thermosiphon evaporative

coolant circulator (will replace USA15 C3F8 compressors)

(See also slides by Michele Battistin)


Degassing sonar

Sonar UFM

3-4 aspirating sonars SCT, pixel, IBL, TRT(?) :Poweredge 610 handling all sonars,

interface to ATLAS FSM and DB18

Condenser platform

Cable slot

3178

3185


Degassing sonar (now leak-tested for installation) & local electronics

Being assembled & tested by Sergey Katunin


Control cables for Thermosiphon condenser & degassing sonar

Claddin

g wal

l

Bldg 3

178

Sonar

elec

tronics

cabin

et

mou

nted on

fram

e

Bldg 3185



-controller:

Modbus under TCPIP

-controller:

Modbus under TCPIP

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ATLAS ATCNnetwork

AT

LA

S A

TC

Nn

etw

ork

Sonar system integration into the ATLAS DCSSonar system integration into the ATLAS DCS

High flow UFM now installed in USA15 compressor room


Gas flow

Gas flow

Sound transit time diff in opposedDirections at 45º to gas flow flow rate

Local sonar electronicsto go on wall next to door

ATCN ethernet spur to switch in T/DAQ room

4-20mA signalsFor Tup, Tdown,

Ultrasonic flowmeter in thermosiphon C3F8 vapour return line (400 l/sec) to surface: installed in USA15

Thermosiphon PLC-based control system racks

(provide sonar UPS feed)


Instrument can also analyze C3F8/C2F6 blend molar ratioif blend operation becomes necessary.


Ref: Alex Bitadze PhD thesis (Univ. Glasgow):

Evaporation temp. improvement in SCT bistave with varying C2F6/C3F8 blends:

(Vertical error bars represent ± 0.3% precision on blend measurement with sonar in a combined flowmeter/analyzer)


SOME RECENT SONAR REFERENCES (not exhaustive)

[1] R. Bates et al, JINST 8 (2013) P02006[2] R. Bates et al, “A custom on-line ultrasonic gas mixture analyzer with simultaneous flowmetry, developed for the upgraded evaporative cooling system of the ATLAS Silicon Tracker.” Proc. 3rd intl. conference on Advancements in NuclearInstrumentation, Measurement Methods and Applications, Marseille, June 23-27 2013; to be published in IEEE Trans. Nucl. Science.

[3] R Bates et al, JINST 8 (2013) C01002[4] R. Bates et al, IEEE Trans. Nucl. Sci. 59(2012) 2367[5] R. Bates et al, “SIMULTANEOUS ON-LINE ULTRASONIC FLOWMETERY AND BINARY GAS MIXTURE ANALYSIS FOR THE ATLAS SILICON TRACKER COOLING CONTROL SYSTEM.”Proc 14th Intl. Conference on Accelerator & Large Experimental Physics Control Systems, San Francisco, Sept 25-30 2013; to be published in JINST

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Sonar measurements allow continuous real-time analysis of binary gas mixtures

(including those formed by leaks) Sonar is being integrated into the ATLS DCS.

Precision improves with mol. wt. difference:

Sonar has repeatedly identified in-operation leaks in layer 2 of pixel detector at 10-5 level:

Used for SCT environmental gas, soon also IBL:

Will play a vital role in thermosiphon operation

Also for possible C3F8/C2F6 blend operation


Back-up slides


WallInstallation(automatedsampling)

3082nd Sonar Meeting, CERN, October 16th, 2013

Original tube positions respected in new panel (old labels still relevant)

Status of ID sonar developments Greg Hallewell Centre de Physique des Particules de Marseille

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