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Straw-tubes. We have made 4 out of 16 endplate pieces, and checked their 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. Sample Tubes. - PowerPoint PPT Presentation
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Straw-tubes
We 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 rates
At 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.