Overview of Hardware R&D

George LolosUniversity of ReginaGlueX Meeting, Glasgow, August 4,

2003

Outline

BCAL R&D Progress at ReginaRegina plans for 2004FSU MoUIU R&D

BCAL R&D Progress at Regina

2-m long, 17-cm thick module completedLight transmission testing under wayHPD/MCP+ circuits ongoingRay tracing code completeGEANT/ROOT progress (tomorrow)

Regina Grid Portal v.1.0 works (tomorrow)

2-m Module Gallery - 1

Now that’s a toilet paper roll!

2-m Module Gallery - 2

No we have no bananas.

2-m Module Gallery - 3

Hair salon? Combs nonetheless!

2-m Module Gallery - 4

All that glue for GlueX.

2-m Module Gallery - 5

Machined to perfection.

2-m Module Gallery - 6

… but on closer look:

2-m Module Gallery - 7

The Great White North

2-m Module Gallery - 8

The Canuck Crew.

Next Steps for Pb/SciFi

2-m testing with cosmics and beam (Hall B?)1-m prototype with Scint sheets (IU).4-m prototype construction at CSR/UofA MOU with UofA signed. 100-km fibers ordered, Pb and glue. Softer Pb being ordered from Vulcan 4.5-m press in design stage Spooling apparatus R&D Clean room facilities at UofA being setup Timetable: completion June 2004

HPD/MCP Electronics

HPDs Limitations in timing resolution New preamp/shaper from Cremat Collaboration with P. Smith (IU)

MCP and other devices (under study)Conventional PMTs?

Ray Tracing in Fibers

Objective: find light transmission, timing resolution Compare air vs. glue “cladding” ncore=1.59, ninner=1.49, nouter=1.42

Photons: random origin and directionGeometry and ElectrodynamicsCompare to reflection coefficientTally escaped s, calculate traversal time for others

Ray Tracing Results - 1Cladding index 1.49 in air (5000 rays)

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Transmission: 58.1%

Ray Tracing Results - 2Cladding index 1.49 in glue (5000 rays)

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Transmission: 12.1%

Ray Tracing Results - 3Cladding index 1.42 in air (5000 rays)

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Transmission: 57.0%

Ray Tracing Results - 4Cladding index 1.42 in glue (5000 rays)

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Transmission: 21.3%

UPV – FSU MOUBack angle soft photon detection Use soft iron to recover uniform B-field Photons greater than 20 MeV Photon multiplicity capability Fast timing and trigger feeding

UPV 18 layers of 1-cm thick scintillator Each layer has 7 34cm x 238 cm paddles (x,u,v) Wavelength shifter, single PMT per paddle 12 layers of 0.635-cm Pb sheets 6 layers of 1.270-cm Pb sheets

Construct & Test Fe- and Pb-based module

Particle IDIU R&D

Particle IdentificationTOF tests inRussia - Serpukhov

Magnetic shielding studies

Cerenkovcounter

TOF Prototype

Magnetic ShieldingHelmholtz coils built by undergrads lastyear - upgraded this year new power supplies

Magnetic Shielding

Barrel Calorimeter

Dan Krop and IU will build a lead/scintillatorsheet calorimeter module and we will do a direct comparison with scifi/lead design to seeif a less expensive design is feasible.

Beam tests will be performed at IHEP

This work in conjunction with U of Regina

Barrel Calorimeter

Barrel Calorimeter

Straw-tubesWe have made 4 out of 16 endplate pieces, and checkedtheir accuracy.

We have purchased 250 1.6 cm diameter straw tubes.

We are getting glue samples.

We are prototyping feed throughs

We are carrying out gas studies using Garfield.

Straw-tubes from Euclid

10000 rpm 10 mil saw to cut the tubes

250 tubes arrived in 1 week at50 cents each. (High reject rate.)

Sample Tubes

Straw-tube Chamber Status

The four prototype endplates set up with some straws inserted. TheGoal is to put a few hundred tubes in, and then instrument 10s ofChannels.

Feed Through’s

Hand making each one.

Items under study

Conductive epoxies for the straws, looking at both conductivity and gas tightness.

Radiation hardness of materials.

Gas mixtures for the chamber.

Construction techniques.

Network Bandwidth StudiesWe have carried out a number of tests to see the data ratesAt which we are able to move large amounts of data fromJLab to CMU. Currently can get ~70Mbits/second!

JLab

PSCCMU

ESNET

OC3 (155Mbit/s)

Internet 2OC48 (2480Mbit/s)

GigaBit

RAID

100Mbit

Will move to OC12 (620Mbit/s)

bottleneck

bottleneck

Move to GigaBit

We can move 1GigaByte of data in ~115 seconds. We can cut this by 2-3 with upgrades.