[RASMB] hiccups

[Chad Brautigam]

Many thanks to those of you who replied to my post!

To recap:

John Philo thought that the problem could be the motion of the slit  
assembly.

Andrew Leech wonders if there should be a flattened part of the scan  
before the jump if the rail is the problem.  I'm not sure, but I don't  
think that's necessarily the case.  Among other things, he also  
wonders if the 400 nm filter was out of position.  Alas, I made that  
mistake about a week ago, but not this time.  He suggests an intensity  
check on an empty hole, which I will do as soon as practicable.

Claus Urbanke suggests that there might be a voltage regulation  
problem with the PM, the kind that might show up if there were  
absorbing materials in the reference holes.  There should have been no  
(and there was no) intensity gradient in the reference holes, so, if  
that is the problem, I think there must be something really faulty  
with the PM voltage regulation.  Claus, would such a phenomenon always  
show up at (roughly) the same radial position in three different cells?

I'll keep y'all posted on the solution to the problem.

Best wishes to all for the holidays!
Chad

======================================
Chad A. Brautigam, Ph.D.
Assistant Professor
Department of Biochemistry
The University of Texas
Southwestern Medical Center at Dallas
Department of Biochemistry
5323 Harry Hines Blvd.
Rm. ND10.214G
Dallas, TX 75390-8816
Office:  214-645-6384
Fax:  214-645-6353
Email:  chad.brautigam at utsouthwestern.edu