svd summary

7th B2GM

SVD Summary

19 November 2010

Markus Friedl (HEPHY Vienna)

Agenda

19 November 2010 Markus Friedl (HEPHY Vienna) 2

SVD Summary

Please look at slides for details.

7th BG2M

SVD Mechanics

18 November 2010

Immanuel Gfall (HEPHY Vienna)

Service Ways

18 November 2010 Immanuel Gfall (HEPHY Vienna) 4

Ribbon Cables

• CAD study to show if service space is available• Almost straight cable paths are possible• Study shows that there is still space left

SVD Mechanics

Support Assembly

• Built around beam pipe• SVD support structure is split into halves• Beam mask needs to be split as well


Beam Mask

End Rings

Support Cone

Patch Panel Space

SVD Mechanics

Cooling: CO2 Blow System


T= 23°CP=57bar

T> -20°CP=57bar

T= -20°CP=20bar

T= -20°CP=20bar

T= -20°CP=20bar

SVD Mechanics

SVD Readout ElectronicsMarkus Friedl (HEPHY Vienna)

Location of FADCs & Power Supplies

• At side of KLM• Accessible during running• Alternatively on top of KLM

(but then locked)

Ideally here1 rack on each side (forward, backward)

+ power supplies


Gamma Irradiation (3-5 October 2010)

• SCK-CEN @ Mol (Belgium)

• 1.25MCi (all rods) 60Co source () under water

• 3.4 MRad (water) per hour at peak position

• Performed in the middle of beam test @ SPS (CERN)


SVD Readout Electronics

Parts for Irradiation


Origami module

Micron trapezoidal module

Micron baby modules

Electronics


Irradiation Summary w.r.t. Electronics

• Voltage Regulator (LHC4913) – Literature says it withstands 100MRad, confirmed to 70MRad– Perfectly fits our needs

• Humidity Sensor (SHT21) – Not radiation hard– Radiation tolerant sensors used in LHC are not available

anymore (company disappeared)– CERN people try different concept with cooled mirror

(condensation) and reflectivity measurement– I am afraid this will not be too bulky to install in Belle II SVD– Presently, I can only think of humidity measurements outside the

radiation area (=dry air blown in and sucked out of SVD volume)



SVD Finesse Transmitter Board (FTB) (Sender Part for HSD Link)

18.11.20106 slides

18.11.2010 wacek ostrowicz

Version 12For SVD session of VII B2GM (17-20.11.2010)


18.11.2010 wacek ostrowicz 2/6

General view – 40 sets of two boards

PIXEL

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Giessen Box

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RJ45 #1

#81

#80RJ45…

RJ45 #2

CO

PP

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#40

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CO

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#2

opt FRB

CO

PP

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#1

opt FRB

…

#1 #40

FT

B#8

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op

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FADC#80

RJ45

RJ45

FT

B#

2

op

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FADC#2

RJ45

RJ45

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B#1

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FADC#1

RJ45

RJ45

SVD electronics

SV

D-C

ON

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(SV

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FC

RB

RJ45

SVD tracker


18.11.2010 wacek ostrowicz 5/6

SV

D

FIN

ES

SE

COPPER in Cracow

Prototype - tests setup

FPGASpartan6

RJ45

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16

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First results of the beam testat SPS 2010

C. Irmler, M. Valentan (HEPHY Vienna)

The devices under test

Origami 6” module

Micron Wedge module Micron Baby module

Pitch p, n # strips p, n interm. Strip p,n p-stop ThicknessOrigami 75, 240 768, 512 yes, yes atoll 320

Wedge sensor 50-75, 240 768, 512 yes, yes combined 304Baby sensor 50, 100 512, 256 yes, no 3 different 304

First Beam Test Results

18 November 2010 C. Irmler, M. Valentan (HEPHY Vienna) 16

Origami module performance

si gnal [e]0 10000 20000 30000 40000 50000 60000 70000 80000 90000

en

trie

s [

]

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Origami6_mod2_p (Orgami6_2) - Signal siC19Entries 129690Mean 2.639e+04RMS 1.069e+04

clw peak [e ] FWHMentries 1 24142.5 39.2 40176 2 20519.4 38.6 67046 3+ 25983.2 66.1 22468

avg. peak = 22588.4

Origami6_mod2_p (Orgami6_2) - Signal

SNR []0 10 20 30 40 50 60

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Origami6_mod2_p (Orgami6_2) - SNR snr19Entries 129690Mean 16.17RMS 5 .976

clw peak FWHM entries 1 19.0 47.2 40176 2 11.6 42.7 67046 3+ 12.0 65.5 22468

avg. SNR = 14.0

Origami6_mod2_p (Orgami6_2) - SNR

Signal and SNR of Origami #2, p-side, -10 °C



Origami Cooling

• cooling of APV chip surface • used adapted APV settings for subzero cooling • coolant: water with glycol anti-freeze• best performance @ -10 deg. C

SNR vs. temperature

5.007.009.00

11.0013.0015.0017.0019.0021.0023.0025.00

-10 deg 15 deg uncooled (~70 deg)Temperature

Sign

al to

noi

se ra

tio

Origami 2 p

Origami 2 n

Cooling



First results, SNR

• References [1] and [2] favor combined pattern• Worst option according to our measurements!

[1] IEEE Transactions On Nuclear Science 45 (1998) 303-309 - Iwata et.al. - Optimal P-Stop Pattern for the N-Side Strip Isolation of Silicon Microstrip Detectors[2] IEEE Transactions On Nuclear Science 45 (1998) 401-405 - Unno et.al. - Evaluation of P-stop Structures in the N-side of N-on-N Silicon Strip Detector



21

SVD material budget

22

pT = .1 to .2 GeVCellular automaton algorithm

SVD: Straight vs. SlantedMarkus Friedl (HEPHY Vienna)

Items from Ushiroda-san’s List

• Performance– See next presentation by Zbynek

• Cost– Barrel needs +31 sensors ( +150k€), +310 APV25 chips &

additional FADCs ( +150k€), FTBs, Copper boards,… – Total +400k€

• Service Space, Mechanical Feasibility– No problem (see Immanuel‘s talk on mechanics)

• Beam Masks– Not affected at important location (close to IP)


SVD: Straight vs. Slanted

How to Proceed?

• 1. Let’s see Zbynek’s results• 2. Let’s start discussion• Decision may be deferred to Cracow meeting (13/14

December 2010)

There was a discussion including tracking & alignment.

Then the decision was taken in favor of slanted option.



First beam test results

svd summary

Documents

pitch p

strips p

strip p

svd summaryplease

svd volume18

svd session

svd readout electronicsparts

middle of beam test