Description: Unnamed Postscript DocumentAttached .ps files contain foil tension measurement data for 2 foils. The tension was measured by clamping the foil in the "foil clamp" discussed at the recent collaboration meeting. Argon was flowed into the device at 50 cc/min and measurements of differential pressure (inside foil-->atm) were made at 15 sec (or 30 sec) intervals. Flow was turned off after 240 seconds and pressure was monitored for another 2 or 3 minutes to detect any leaks (or changes in atmospheric pressure!). The tension was calculated for each time interval using the relation F = C(dP/dt) to calculate the foil capacitance, and then using the relation T = (Pi)r^4/(8C) where F=flow rate, P=diff pressure, T=foil tension, r= radius of foil, C=capacitance of foil. FOIL00 was an "old" foil stretched using the vacuum stretching ring. FOIL01 was stretched using the "new" mechanical stretching device on the granite table.
Description: Unnamed Postscript Document
Description: Unnamed Postscript Document