From jrgdavid at stanford.edu  Fri Aug 26 18:27:30 2011
From: jrgdavid at stanford.edu (Rakesh Jeyasingh)
Date: Fri, 26 Aug 2011 18:27:30 -0700 (PDT)
Subject: Fwd: Cryo issues
In-Reply-To: <CABpD83Kvf69akXXRuCWt30U9dG8jBcg4_A5NnB+oE=XyNXEVNw@mail.gmail.com>
Message-ID: <1071971095.1048729.1314408450861.JavaMail.root@zm06.stanford.edu>

Hi all,

I think some of you might know about the issues with the cryo station that we have had during the summer. I was able to verify it with the Arash (the previous trainer) and according to him this seems to be a major issue. Just to remind you all about the problem, early this summer the radshield (the inner chamber) became unstable and became hard to probe the devices.  (I have attached the video showing how much it shakes). Unfortunately I was traveling during that time and I did not know who used the station as there were no records or logs despite me sending warning emails. So it was hard for me to track it. Nobody claimed responsibility. I shutdown the system for a while as I was trying to figure out what the issue was. Now after confirming with Arash (read the email from him below) I believe that we should not be using the system until it is fixed as it might damage the system further. 

Unfortunately I cannot follow up on this as I'm leaving for China in 2 days and won't be back for another 4 months. I would recommend the people who have used it frequently in the past (I hope they can step up)to take responsibility and try to fix this. Arunanshu, the other trainer is also doing internship and won't be back until late september. 

I think the usage procedure for Cryo should be changed such that we can track every usage of the machine and know exactly the status of the system after every user uses it. These are very delicate equipment and the users should be responsible when they handle it. I hope users can work together to get this repaired. Based on my previous enquiry with lakeshore (Mr. Jeff) the estimate is about $1500 + shipping. I will be willing to help with any details via email.

* DO NOT USE THE SYSTEM UNTIL THIS PROBLEM IS SOLVED. (Bin Yang, you can just unload your sample)
* Contact Lakeshore (Vaden West 614-818-1600) regarding this issue.

Rakesh

----- Forwarded Message -----
From: "Arash Hazeghi" <ahazeghi at gmail.com>
To: "Rakesh Jeyasingh" <jrgdavid at stanford.edu>
Sent: Friday, August 26, 2011 6:05:19 PM
Subject: Re: Cryo issues

Rakesh, 

Unfortunately this looks like extensive mechanical damage to the system, looks like the entire bellows assembly that holds the cold head has been broken off from its base. First thing you should do is to put the system down immediately as this might cause more damage. Under normal conditions this should not happen unless someone was messing up with the cold head in order to modify the stage or something like that. 

There is not much you can do, best is to contact Lakeshore (Vaden West 614-818-1600 tell him I gave you his number) and ask him if they can do a favor and send field service and try to repair it on-site. If they can't then unfortunately you have no other choice than sending it in. You will need to carefully pack the system (remove all arms) and then use especial insured cargo service to ship it. Ask lakeshore what they recommend as I have never done this before. 

Good luck! 

Arash 





On Fri, Aug 26, 2011 at 5:48 PM, Rakesh Jeyasingh < jrgdavid at stanford.edu > wrote: 


Hi Arash, 

I have just taken a video to show what the issue is. I show that the isolation table is adjusted properly first. Then you can see that the radshield inside shakes quite a bit as I touch it with my fingers. This causes a lot of instability when probing in room temp and pressure conditions. however what I heard from the other users is that when it is probe at room temp and low pressure conditions that contacts are better. But this wasn't the case earlier. Let me know what you think. 

thanks, 
Rakesh 

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From Bin.Yang at globalfoundries.com  Sat Aug 27 08:51:18 2011
From: Bin.Yang at globalfoundries.com (Yang, Bin)
Date: Sat, 27 Aug 2011 10:51:18 -0500
Subject: Cryo issues
In-Reply-To: <1071971095.1048729.1314408450861.JavaMail.root@zm06.stanford.edu>
References: <CABpD83Kvf69akXXRuCWt30U9dG8jBcg4_A5NnB+oE=XyNXEVNw@mail.gmail.com>
 <1071971095.1048729.1314408450861.JavaMail.root@zm06.stanford.edu>
Message-ID: <B0C5D086C71BD745BF0E6B8831E9320CA53F57FF@VAUSEXMBXP1.gfoundries.com>

Hi Rakesh,

Okay. I will unload my samples. Will not use it.

Thanks,
Bin

-----Original Message-----
From: Rakesh Jeyasingh [mailto:jrgdavid at stanford.edu] 
Sent: Friday, August 26, 2011 6:28 PM
To: cryostation at snf.stanford.edu; cchen at intermolecular.com
Cc: H.-S. Philip Wong; nishiy at stanford.edu; saraswat at stanford.edu
Subject: Fwd: Cryo issues

Hi all,

I think some of you might know about the issues with the cryo station that we have had during the summer. I was able to verify it with the Arash (the previous trainer) and according to him this seems to be a major issue. Just to remind you all about the problem, early this summer the radshield (the inner chamber) became unstable and became hard to probe the devices.  (I have attached the video showing how much it shakes). Unfortunately I was traveling during that time and I did not know who used the station as there were no records or logs despite me sending warning emails. So it was hard for me to track it. Nobody claimed responsibility. I shutdown the system for a while as I was trying to figure out what the issue was. Now after confirming with Arash (read the email from him below) I believe that we should not be using the system until it is fixed as it might damage the system further. 

Unfortunately I cannot follow up on this as I'm leaving for China in 2 days and won't be back for another 4 months. I would recommend the people who have used it frequently in the past (I hope they can step up)to take responsibility and try to fix this. Arunanshu, the other trainer is also doing internship and won't be back until late september. 

I think the usage procedure for Cryo should be changed such that we can track every usage of the machine and know exactly the status of the system after every user uses it. These are very delicate equipment and the users should be responsible when they handle it. I hope users can work together to get this repaired. Based on my previous enquiry with lakeshore (Mr. Jeff) the estimate is about $1500 + shipping. I will be willing to help with any details via email.

* DO NOT USE THE SYSTEM UNTIL THIS PROBLEM IS SOLVED. (Bin Yang, you can just unload your sample)
* Contact Lakeshore (Vaden West 614-818-1600) regarding this issue.

Rakesh

----- Forwarded Message -----
From: "Arash Hazeghi" <ahazeghi at gmail.com>
To: "Rakesh Jeyasingh" <jrgdavid at stanford.edu>
Sent: Friday, August 26, 2011 6:05:19 PM
Subject: Re: Cryo issues

Rakesh, 

Unfortunately this looks like extensive mechanical damage to the system, looks like the entire bellows assembly that holds the cold head has been broken off from its base. First thing you should do is to put the system down immediately as this might cause more damage. Under normal conditions this should not happen unless someone was messing up with the cold head in order to modify the stage or something like that. 

There is not much you can do, best is to contact Lakeshore (Vaden West 614-818-1600 tell him I gave you his number) and ask him if they can do a favor and send field service and try to repair it on-site. If they can't then unfortunately you have no other choice than sending it in. You will need to carefully pack the system (remove all arms) and then use especial insured cargo service to ship it. Ask lakeshore what they recommend as I have never done this before. 

Good luck! 

Arash 





On Fri, Aug 26, 2011 at 5:48 PM, Rakesh Jeyasingh < jrgdavid at stanford.edu > wrote: 


Hi Arash, 

I have just taken a video to show what the issue is. I show that the isolation table is adjusted properly first. Then you can see that the radshield inside shakes quite a bit as I touch it with my fingers. This causes a lot of instability when probing in room temp and pressure conditions. however what I heard from the other users is that when it is probe at room temp and low pressure conditions that contacts are better. But this wasn't the case earlier. Let me know what you think. 

thanks, 
Rakesh