Raith is qualified: Question on higher acceration voltage operations. Users restricted to below 20 kV until further notice.

James Conway jwc at snf.stanford.edu
Tue Jul 11 12:17:40 PDT 2006


Currently the system is not to be operated above 10 kV until I test the 
column at higher acceleration voltages.  This week I hope to obtain 
stables gun vacuum levels and bring the system to 20 kV for testing. I 
will wish to maintain below 20 kV for at least the next ten days to two 
weeks.  Once I know the FE-GUN is run in well , that emission is stable 
and that gun vacuum is fine, I will then test at elevated acceleration 
voltages and up to 30 kV.

Please see me if you have any questions...

Thank you,

James Conway

Ofer Levi wrote:

> Hi James,
> Thanks for the update. Glad to see that all goes well, with the Raith 
> maintenance.
> As you recall, lately I use 30 KV in my writes. I reserved some time 
> for a week from today on the Raith. Can you please estimate if you 
> think by that time the Raith will be qualified for operation at 30 KV ?
> Thanks,
> Ofer
> At 05:20 PM 7/7/2006, you wrote:
>> Greetings Raith Users:
>> System has passed qualification with flying colors.  Excellent spot 
>> and SPLine resolution with short shots to 13 nm.
>> Measurements on this test next week.
>> Users should not operate above TEN KV acceleration voltage.
>> Thank you for your support!
>> James Conway
>> P.S., on the road this weekend available on my cell phone...
>> -------- Original Message --------
>> Subject: Comment raith SNF 2006-07-07 17:10:04: Raith is qualified
>> Date: Fri, 7 Jul 2006 17:10:05 -0700
>> From: jwc at snf.stanford.edu <mailto:jwc at snf.stanford.edu>
>> To: raith-pcs at snf.stanford.edu <mailto:raith-pcs at snf.stanford.edu>
>>qual test and pcm test run with excellent results.
>>System back up online and available for users as scheduled.
>>Users restricted to no more than 10 kV Acceleration voltage for the next week as we run in the NEW FE-GUN.
> ______________________________________________
> Ofer Levi,      Ph.D.
> Department of Electrical Engineering, Stanford University
> CIS-X Rm 310,  Stanford, CA 94305-4075
> Phone:                             (650)723-0464 or 725-6907
> Fax:                                              (650)723-4659
> Adm. Asst.: Gail Chun-Creech                  Ph:  (650)723-0983
> E-Mail:                          levi at snow.stanford.edu
> Web page:               http://snow.stanford.edu/~levi/
> <http://snow.stanford.edu/%7Elevi/>______________________________________________
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