Detector Parallel Session Video Conference Fri 13/6

8:30 Grichine EMCal Simulation Update

09:00 Bonesini TOF Update Radicioni Rates at TOF0

09:30 Gastaldi TPG Status and Plans

10:00 Sato KEK Test Results/Plans 10:30 Coffee 10:50 Barber SciFi Tracker: Progress in Design, Prototype, Plans11:10 Sedgbeer SciFi Tracker: Software Status/Plans

11:30 Summers Tracker Choice Ground Rules and Process 12:00 Discussion

1) Progress towards upgrade of the “downstream bug” downstream PID taylored to 300 MeV/c eV Tkin )based on only existing old track files, so never adapted to 200 MeV/c

eV ) needs some serious rethink (by means of new track files !!!) 1000 muons throu G4MICE…. a MUST !!! ….. volunteer needed !!!

2) Short update from TOF ( B field tests, TOF 0 max rates …) NB TOF0-TOF1 may well be only 6 m apart (B. Palmer)

3) Major progress on both trackers !!!!!!!!!!!!!!!!!!!! congratulations to both teams

next CM …. end of October ….. …… OK CORRAL …..

4) Rules of the shoot-out (Summers & Gregoire)

Introduction ….. and summary

1) Progress towards upgrade of the “downstream bug”

first semirealistic study of end region (PID) at lower (200 Mev/c) limited, not G4MICE yet…….

Grichine EMCal Simulation Update the belt (tag) see slides

the art of e/separation gets different

thinner slicing? ….. fully active detector?

Need a G4MICE serious study …. PLEASE VOLUNTEER! 1000 ! a proper first goal (and boost) for our simulation software

and effectiveness in detailed detector design

including downstream Cerenkov the suspenders (etag) may prove embarassing, otherwise

2) Short update from TOF

Sci+PMT tests in B field set up at INFN-Mi (Bonesini)

up to 1 Tesla … 12 cm gap warm magnet

results soon

….. NB good to keep at least TOF0 away …

at 200 MeV/c TOF0-TOF1 may well be only 6 m apart

TOF 0 max rates (Radicioni)

up to 5 MHZ tolerable to DAQ

lower limit certainly from PMT’s , answer needed

3) Major progress on TPG tracker !!!!!!!!!!!

congratulations to the TPG team

09:30 Gastaldi TPG Status and Plans see Radicioni’s slides

small GEM chamber prototype operational in Napleswith final front electronics

being equipped with a 10 cm field cage test learning chamber ….. may make it to LAB G big hopes …. tagged Co & Mn X-ray sources

full size MICE end cap being built GEM amplification with hexaboard read-out with final front end electronics to be adapted to full HARP 1.5 m field cage in the CERN PS East Hall (painful resurrection) cosmic rays first … beam “traccino” mid September real MICE prototype ….. own 1 m field cage ready in 2004

3) Major progress on Sci-Fi tracker !!!!!!!!!!!

congratulations to the Sci-Fi team

10:00 Sato KEK Test Results/Plans lab tests … reducing photon MFP (.460 mm) … x-talk … several new fibers delivered for studies of MFP & much more 2 weeks of beam tests at KEK later this month

10:50 Barber SciFi Tracker: Progress in Design, Prototype, Plans prototypes of support of single stage of 3 fiber planes support of connectors AND connectors (7 fold multiplexing built in !!! ) final carbon fibers structure in September

11:10 Sedgbeer SciFi Tracker: Software Status/Plans • SW simulation & reconstruction -- most of the functionality required is in place• Computing resources -- adequate resources available• Manpower resources - losing Ed – will be replaced … but test beam commitment

– plus some extra manpower for SW & Grid• Aim to complete required SW studies by October

KEK Test Results / Plans

Akira SATO

Osaka University, Japan

contents

• Cross talk of SCSF78• Fiber optimization• KEK plan• Attenuation length• Beam test

Cross talk for SCSF78

• Experimental data can be explained assuming that mean free path of primary photon is 460m.

1.0GeV/c

1.0GeV/c

proton/p ratio

300m 0.5 p.e. 0.8 p.e. 0.68

500m 1.2 p.e. 1.6 p.e. 0.75

dE/dx1.8

MeV/cm

2.6

MeV/cm0.7

Sci-Fi

Primary photon

1.0GeV/c

1.0GeV/c

proton

300m 1.92 p.e. 2.77 p.e.

500m 2.92 p.e. 4.21 p.e.

300m 0.55 p.e. 0.80 p.e.

500m 1.20 p.e. 1.72 p.e.

Experimental data

Expected # of p.e. with 0m MFP

Expected # of p.e. with 460m MFP

From last KEK beam test results

Optimization of 3HF fiber• Alan estimated the mean-free path (MFP) for absorption by 3HF of the primary scintillation light from the primary dopant p-terphenyl (pT).

• The absorption can be expressed as

– I/Io = 10-(cd)

: the molar extinction coeff. in (moles per liter-cm)-1 at wavelength c : the concentration in moles per literd : the distance in cm

• Attenuation length for the primary dye emission via 3HF absorption :– 50m for 1dye+3HF(1500 ) D0 tracker– 21m for 1dye+3HF(3500)– Very short for 3HF(5000) w/o 1dye

• At high concentrations, 3HF acts like a primary dopant ie, its coupling the the fundamental PS excitation is quite strong.

KEK and Osaka Plan• Scintillating fibers had been deriverd to Osaka Univ. June 3rd

– Standard primary(pT) + 3HF(2500ppm) – Standard primary + 3HF(3500ppm) – Standard primary + 3HF(5000ppm)– 3HF(5000ppm) only

• 0.35mm, round, multi-clad, s-type

• We are planing to study :– Attenuation length– Aging of bending fiber– Light yield (beam test)– Cross talk (beam test)

Attenuation length• Measurement has just started.• Cracks in fiber reduce light yield.• Need some quality control preliminarypreliminary

KEK beam test

• June 25th - July 2nd• @ KEK 2 beam line• Photon detector

– Hamamatsu R7899 MOD• Extended Green Photocathode• 1 inch diameter• 10 stage• Head-on Type• Prismatic Window

• Light yield• Cross talk

Sci-Fi

PMT (R7899)

summary

• The most suitable fiber for MICE scifi tracker will be selected by KEK studies.Candidates : – Standard primary(pT) + 3HF(2500ppm) – Standard primary + 3HF(3500ppm) – Standard primary + 3HF(5000ppm)– 3HF(5000ppm) only

• Attenuation length• Aging• Light yield• Cross talk

– Beam test : June 25th - July 2nd @ KEK-PS 2

D.Websdale - Particle Phyisics with Advanced Study: 16-03-00

15

Plans for Sci-Fi Prototyping.

Contents:-

Mechanical Layout of Sci-Fi

Design of the Fibre Optic Connectors

Design Issues Still to be Addressed

Future Plans

This work is being undertaken by Imperial College and Liverpool

University physics Department (Peter Cooke), Fermilab (Alan

Bross),

KEK (Koji Yoshimura), Osaka (Yoshi Kuno, Akira Sato)

Mechanical Layout of Sci-FiA Reminder of the Layout of the 5

Stages

?

Reasons to build the Sci-Fi Prototype

The aims of the Single stage prototype will be to:-

Prove the feasibility of the design

Solve any production problems

Try to develop more efficient (and cheaper if possible)

construction techniques

Ensure that all stages can be made exactly the same

Test the efficiency of the light guide connectors

Check the spatial repeatability of the support system

To create a working detector to allow full system

functionality to be developed

The Original Model

Mechanical Layout of Sci-Fi Prototype Single Stage

Layout

Mechanical Layout of Sci-FiConnector Plate

Mechanical Layout of Sci-FiVirtual Reality

Mechanical Layout of Sci-FiReality

Design of the Fibre Optic Connectors

The fibre optic connector design is governed by the following factors :-

Multiplexing Layout of Sci-Fi

‘Stringing’ feasibility of the Connectors

Cost, ease of manufacture and delivery

Available space

Design of the Fibre Optic Connectors

The 1st Iteration…

This had 126 - 380 holes which where so close that it is impossible to mould not to mention that they would need to have the fibres threaded in the correct order.

Design of the Fibre Optic ConnectorsThe 2nd Iteration…

This has a diagonal stagger to

maximise the distance between

the holes (it was still not enough)

AND STILL

126 separate 350 fibres

Need to be threaded per connector!!!

Design of the Fibre Optic Connectors

The 3rd Iteration…

This has a diagonal stagger to maximise the distance between

the holes but more important is that it multiplexes at the stage.

This means that the fibres will be threaded in bundles of 7 from the Fibre plane and all subsequent units will have 18 1mmØ fibres.

Layout of the connectors in the space available

Detail of Connector Plate

Design of the Single StageThe aim, as already stated, is to have all the stages the same. This means that there is only one development programme.

Further advantages are:-

that the amount of spares can be minimum

All stages are interchangeable should it be necessary to fit a

less efficient stage in a less critical position

Production will be easier

Issues Needing to be Addressed

Detailed design of tooling for the manufacture and assembly of

the stages

How to lay down the fibres to a known accuracy

Light transmission of the connectors

Multiplexing (is this the correct approach)

Fixing and sealing into position

…………………

Future (short term) Plans

To define and build the prototype stage whilst addressing the

manufacturing problems

To design and develop the tooling for the carbon-fibre

structures

To further develop the fibre-optic connector

To develop assembly and installation procedures

???

Schedule

SciFi Tracker – SW Status & Plans

• General SW status– Simulation & Reconstruction

• Performance Studies & Plans• Test Beam• Resources• Summary

…. Plans concentrate on now till October 2003

Julia Sedgbeer for Ed McKigney

Imperial College London

SciFi

Engineering representation – 5 stations

a) Ribbon doublet structure b) u-v-t fibre plan

Questions from Review Panel• Fibre tracker

– It seems essential to perform a full simulation of a tracker with five planes, including nominal inefficiency and assessment of the redundancy by simulation of the loss of readout— dead fibres. The impact of noise and misalignment should also be assessed. What is the status of this simulation?

– Because of the cost saving by multiplexing, it is important to repeat the simulation in a realistically multiplexed arrangement.

– Will the main alignment be derived from “straight through” muons?

– Some documented information on the performance of the fibre tracker in the MUSCAT experiment would be useful.

General SW Status

feature status ‘nominal’SciFi simulation

‘ideal’ SciFi simulation

5 stations Electronic noise 0 (> 2 p.e.) 0

Dead Channels ~implemented 0.25% 0

Multiplexing 7 1 none

Misalignment displacements rotations

0 0

Simulation (Ed Mckigney)

General SW Status• Electronic Noise

– Experience of VLPC’s at DØ – no noise above 2 p.e.

• Cross talk– Experience at DØ – no cross talk – verified by HW tests

• Dead channels – Experience at DØ – 77,000 channels– 200 compromised fibre channels – 0.25%– 190 compromised VLPC channels – 0.25%

• Alignment– Experience at DØ – 835 μm fibres– Precision of fibre mounting ~35-40 μm

DØ fibre tracker - VLPC performance

(A.Bross)VLPC (Visible Light Photon Counter) – Cryogenic APD @ 9K

VLPC HISTE VI

–High QE 80%

–Low noise <5X104 Hz (@1.0 pe)

–High Rate capability

>40 MHz

–High production yield

70%

General SW Status• Reconstruction

– space point algorithm – require hits in 3 views of 1 station

(triplet)– track finder requires 4/5 or 5/5 triplet points – track fit includes energy loss– tracking efficiency & purity already v. good

(Ed Mckigney, Oct 2002, Berkeley)• Grid

– Job submission to Grid exists (IC - EDG) – being automated

(web interface – K.Georgiou)

• RF background simulation– So far used uniform distribution parallel to axis – vary rates– Improved model being implemented (Yagmur Torun)

Performance studies & plans

study ‘ideal’ SciFi

‘nominal’ SciFi – (MUX & dead chn)except study params

RF bkg MUX Dead Channels

Misalignment

RF & dead chn.

Done (Ed Mckigney)

Important

Lower priorty

RF bkg studies - pt resolution

Distributions from the Berkeley meeting

MUX studies - pt resolutionMUX 7 1

reduces pt resolution

by ~2

Performance studies & plans

Reconstruction plans – low priority• Space points

– allow points made from hits in 2 out of 3 views in a station (doublets)

• Track finder– allow limited number of double points per track

Grid plans – priority? – need input from collab.– Extend grid access to MICE collaboration

Test Beam

Plan ..• Single station prototype• Cosmic ray test FNAL – September 2003• Determine:

– Light yield at VLPC – sufficient to allow noise rejection?– Cross talk – small?(Also demonstrate multiplexing and precision of fabrication)

…. compare results with simulation

Resources• Computing

– Some access to Grid farms in IC/HEP and LeSC– Adequate for studies to be done this summer

• Manpower– Ed Mckigney replacement:

– shortlist - expect appointment in July- test beam commitment

– SW: A.Tapper (IC), A.Khan (Edinburgh), J.Sedgbeer (IC),P.Kyberd (Brunel), grad student from Oct. (IC).

– Grid: K.Georgiou (IC), D.Colling(IC)

Summary

• SW simulation & reconstruction– most of the functionality required is in place

• Computing resources– adequate resources available

• Manpower resources– losing Ed – will be replaced

… but test beam commitment – plus some extra manpower for SW & Grid

• Aim to complete required SW studies by October

3) Major progress on Sci-Fi tracker !!!!!!!!!!!

congratulations to the Sci-Fi team

10:00 Sato KEK Test Results/Plans lab tests … reducing photon MFP (.460 mm) … x-talk … several new fibers delivered for studies of MFP & much more 2 weeks of beam tests at KEK later this month

10:50 Barber SciFi Tracker: Progress in Design, Prototype, Plans prototypes of support of single stage of 3 fiber planes support of connectors AND connectors (7 fold multiplexing built in !!! ) final carbon fibers structure in September

11:10 Sedgbeer SciFi Tracker: Software Status/Plans • SW simulation & reconstruction -- most of the functionality required is in place• Computing resources -- adequate resources available• Manpower resources - losing Ed – will be replaced … but test beam commitment

– plus some extra manpower for SW & Grid• Aim to complete required SW studies by October

11:30 Summers Tracker Choice Ground Rules and Process

draft set of rules defined by Don & Ghislain

common technical criteria cost and schedule criteria

Sci Fi specific criteria

TPG specific criteria

To be discussed & agreed by both parties in forthcoming phoneconference(s) well before end of October CM Forthcoming videoconference(s) will monitor progress of both very closely and frequently

1) Progress towards upgrade of the “downstream bug” downstream PID taylored to 300 MeV/c eV Tkin )based on only existing old track files, so never adapted to 200 MeV/c

eV ) needs some serious rethink (by means of new track files !!!) 1000 muons throu G4MICE…. a MUST !!! ….. volunteer needed !!!

2) Short update from TOF ( B field tests, TOF 0 max rates …) NB TOF0-TOF1 may well be only 6 m apart (B. Palmer)

3) Major progress on both trackers !!!!!!!!!!!!!!!!!!!! congratulations to both teams

next CM …. end of October ….. …… OK CORRAL …..

4) Rules of the shoot-out (Summers & Gregoire)

Introduction ….. and summary