Main INDEX
Monthly INDEX
PREV
NEXT
User name Lindgren
Log entry time 11:33:14 on April 18, 2008
Entry number 232885
keyword=Helium Fill
CONTROL ACCESS TO FILL BALLOON.
VINCE AND RICHARD ENTERED HALL
TURNED MAGNET CURRENT DOWN
BIGBITE BALLOON SAGGING ABOUT 10 INCHES AT BOTTOM. NOTICE THAT WHEN I
REMOVED STOPPER, IT WAS NOT PLUGGED IN ALL THE WAY. FILLED WITH HELIUM
FOR ABOUT 20 -30 SECS UNTIL SAGGING DISAPPEARED AT BOTTOM OF BALLOON
INSIDE BIGBITE. CAMERA INSIDE COUNTING HOUSE SHOWS BALLOON NO LONGER
SAGGING. ADJUST POSITION OF BALLOON BY PULLING IT UP AND SIDEWAYS.
BALLOON BETWEEN CHAMBERS LOST LESS HELIUM. SAGGING MUCH LESS AT BOTTOM.
FILL ABOUT 5-10 SECS WITH HELIUM. ADJUSTED POSITION TO CENTER IT SIDEWAYS
ALSO ADDED RED TAPE TO BALLOON AND TO SIDE OF CHAMBER SO IT CAN NOT KEEP
SHIFTING. IF TAPE FALLS OFF BALLOON IT WILL NOT TOUCH WIRE CHAMBER WINDOW
BECAUSE IT IS A SHORT PIECE.
HELIUM CYLINDER PRESSURE IS 600 PSI
NO EXTRA HELIUM CYLINDER AVAILABLE
JACK WILL BRING ONE DOWN BEFORE WE HAVE TO CHANGE IT OUT ON SUNDAY.
WIRE CHAMBER GAS CYLINDER PRESSURE IS 500 PSI
EXIT HALL