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.