Subject: TSpec slit Mechanism

From: mark klaene

Submitted: Sun, 19 Feb 2012 10:37:34 -0700

Message number: 1263 (previous: 1262, next: 1264 up: Index)

Over the past month we have seen a significant increase in Triple  
Spec's slit mechanism failures.  One of the most recent failures  
caused the slit mechanism to stop in a non-science position rendering  
the instrument unusable for several days. Recent testing by the staff  
and the UVa Instrument team have determined that the most likely  
source of these failures is inside the dewar. Since moving the slit  
could render the instrument out of service for a prolonged time we  
have decided to move the slit to the 1.1" position and power off the  
mechanism. As a result,  the only configuration for TSpec slit ,  
effective immediately and for the foreseeable future, is the 1.1" slit.

We are working with the UVa Instrument team to develop a repair plan.

We regret any inconvenience  this may cause, however we feel this is  
the only option we have at this time that will continue to make TSpec  
scientifically productive for the majority of our users. If you  
determine that your time can not be used as a result of this action  
please contact Suzanne Hawley  to arrange a time swap.

Further discussion on the state and productivity of TSpec will be  
held during the upcoming Users Committee teleconference. We encourage  
you to contact your institutional representative for that committee   
with any input you would like to make and to read the  published  
minutes following the next meeting.

If you have any questions please feel free to contact myself or  
Suzanne Hawley


Mark Klaene
APO Site Operations Manager


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