Difference: OpenissuesArchive (1 vs. 2)

Revision 217 Nov 2005 - Main.MichaelGoger

 
META TOPICPARENT name="NmrStaffnotes"
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Closed Issues

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900 cryoplatform install

Issue Status Date Action taken comments
installed OPEN 11/17/05 unit is completely installed 900#1 TCI cryoprobe is operational.
in progress OPEN 4/29/05 Outdoor/indoor units wired-up Need to finish running He-transfer lines and scafold. Boris and Mike.

800/US#2/NE sample get hung up at top of shim stack when eject air is turned off.

Issue Status Date Action takendown comments
problem with sample lowering OPEN 5/31/05 Emailed Brian Lord at Bruker Brian is going to send out a new BST
problem with sample lowering Closed 11/17/05 installed new BST on  
problem with sample lowering OPEN 6/17/05 installed new BST on This seems to have corrected the problem...We will keep this under observation for the next few days.

900 conventional TXI probe 1H sensitivity

Issue Status Date Action taken comments
Poor 1H sensitivity CLOSED 6/7/05 Jeff Parent on-site to evaluate probe. Jeff was able to get lineshape to 4.7/11.1/ , 0.1%EB sensitivity numbers for 200Hz s:n is 2300:1 and water suppresion are, resolution 22%, s:n 407:1 and hump 44.8/107.2
Poor 1H sensitivity OPEN 6/1/05 Emailed Brian Lord at Bruker lineshape sample the non-spin numbers are 5.8/8.2/0.57, however the satellite peaks appear weak, 0.1%EB samples the best 200Hz s:n we get is 1745:1 (should be over 2000:1, Water suppression on 2mM sucrose: resolution is 15%, s:n is 364:1, and water suppression is 42/69. Brian has scheduled Jeff Parent to come in of 6/7 to evaluate the probe.
Poor 1H sensitivity OPEN 5/26/05 Emailed Brian Lord at Bruker 2mM Sucrose S:N ~312:1 down from 450:1/ We will make further attempts to shim the probe in.
 

800conv TXI cryoprobe

Issue Status Date Action taken comments
  CLOSED 5/12 05 TXI cryoprobe #025 installed and met specs.  
out-of-service OPEN 5/05/05 Bruker engineer scheduled to install loaner Probe Tue. 5/10/05  
out-of-service OPEN 4/29/05 Returned to Bruker for repair Expecting a loaner TXI probe.

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-- MichaelGoger - 06 Jun 2005

Revision 106 Jun 2005 - Main.MichaelGoger

 
META TOPICPARENT name="NmrStaffnotes"
Contents

Closed Issues

800conv TXI cryoprobe

Issue Status Date Action taken comments
  CLOSED 5/12 05 TXI cryoprobe #025 installed and met specs.  
out-of-service OPEN 5/05/05 Bruker engineer scheduled to install loaner Probe Tue. 5/10/05  
out-of-service OPEN 4/29/05 Returned to Bruker for repair Expecting a loaner TXI probe.

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-- MichaelGoger - 06 Jun 2005

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