Main INDEX
Monthly INDEX
PREV
NEXT
User name perdrisat
Log entry time 20:28:57 on February11,2000
Entry number 33560
keyword=raster+spot problems
First attempt at taking data at 18:00, after trouble shooting for unacceptable raster profile. Raster spot again 1 mm Hx4 mm V; max current for x-raster in midlle room
increases it to 2 mmx 4 mm, still not acceptable.
18:45 do a HARP scan at request of MCC, to "fix" raster.
20:25 we are still inactive; a power supply has been located, may get installed asap.
THE PROBLEM: we are told that it is necessary to reproduce the beam spot and raster size of the previous kinematics. That is 100micronx100micron at target (harp 6), and 4x4 mm^2 for raster size.
The raster size cannot be made larger than 2x4; ergo we need a new power supply for Moeller quad.
The spot size is of order 100x250 micron, judged unacceptable by Arun.