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MRI Forum
'Quench'
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Dan Russell

Fri. 9 Feb.18,
17:15

[Start of:
'Damage from quench'
2 Replies]


 
  Category: 
Equipment

 
Damage from quench
Hello all, is it possible for a quench to damage a coldhead or compressor? Thanks
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Eduardo Mendes

Tue. 19 Jul.16,
12:59

[Start of:
'Need to quench a scanner now'
2 Replies]


 
  Category: 
General

 
Need to quench a scanner now
HellornrnI have on old Oxford 4.7 T scanner that has been working since 2011. Unfortunately these last few days we could not transfer He in. Although our He liquefier is completely full and the transfer line is connect to the magnet, no He is transferred. The transfer line has been made vacuo efficient two months ago and should be ok. rnrnIt seems that we need to quench the magnet. We don't have any external power supply to connect to the magnet and retrieve the current. rnrnWhat can we do? Is there any safety measures? Can we leave the magnet as it is? Should we evacuate the building? Should we isolate the area? rnrnThank you ever so much for your time and help. rnrnI have contacted Oxford several times but they didn't return my emails. rnrnMany thanksrnrnEdrnrn
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mak stavrak

Sat. 17 Feb.07,
22:48

[Start of:
'Quench'
1 Reply]


 
  Category: 
Safety

 
Quench
hi all
we have 5 quench in girst 2 years.
Is anyone to see this again?
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Steven Ford

Fri. 26 Oct.18,
02:19

[Reply (2 of 3) to:
'Damage from quench'
started by: 'Dan Russell'
on Fri. 9 Feb.18]


 
  Category: 
Equipment

 
Damage from quench
All things are possible but this would be hard to imagine. More likely the coldhead-compressor failed and that led to the quench.
 
 

Steven Ford
Professional Imaging Services, Inc.
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Renate S.

Tue. 27 Feb.18,
16:31

[Reply (1 of 3) to:
'Damage from quench'
started by: 'Dan Russell'
on Fri. 9 Feb.18]


 
  Category: 
Equipment

 
Damage from quench
Accidental or spontaneous quenching may cause severe damage to the magnet and the surrounding (including coldhead). If the MRI quench pipe works as dedicated, the damage related to the coolant should be small. But in any case it is cost extensive and a decision to manual quench should only be made in extreme cases. If there is no potentially life threatening situation call the service engineer.
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