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posted Oct 27 '10 at 06:22

jonis's gravatar image

jonis
11

Gradshimau

I have a problem with gradshim (gradshimau) in topspin. The problem is that im getting spitting on solvent peak (and all other peaks as well) due to poor Z-Shimming.

I have tried 2 ways of creating new shimmaps: 1st I used 3%CHCl3 in Aceton d6 (but I'm not sure this is the best sample to use due to the long relaxation time of the sample). Anyways, i created a new GSHIM file and new shimmapping. When runing Gradshimau Users experienced that they need to manualy shim (especially) Z2 due to the splitting of the peaks.

  1. The same procedure as above but with a sample that contained 90% D20 / 10% H20 + CuSO4, im attaching the shimmap that i created from this sample. the problem is stil that we end up with unwanted splitting due to poor Z2 shiming.

alt text

Any sugestions on how to continue?

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No.1 Revision

posted Oct 27 '10 at 06:29

jonis's gravatar image

jonis
11

Gradshimau

I have a problem with gradshim (gradshimau) in topspin. The problem is that im getting spitting on solvent peak (and all other peaks as well) due to poor Z-Shimming.

I have tried 2 ways of creating new shimmaps: 1st I used 3%CHCl3 in Aceton d6 (but I'm not sure this is the best sample to use due to the long relaxation time of the sample). Anyways, i created a new GSHIM file and new shimmapping. When runing Gradshimau Users experienced that they need to manualy shim (especially) Z2 due to the splitting of the peaks.

  1. The same procedure as above but with a sample that contained 90% D20 / 10% H20 + CuSO4, im attaching the shimmap that i created from this sample. the problem is stil that we end up with unwanted splitting due to poor Z2 shiming.

alt textalt text

Any sugestions on how to continue?

click to hide/show revision 3
No.2 Revision

posted Oct 27 '10 at 06:29

jonis's gravatar image

jonis
11

Gradshimau

I have a problem with gradshim (gradshimau) in topspin. The problem is that im getting spitting on solvent peak (and all other peaks as well) due to poor Z-Shimming.

I have tried 2 ways of creating new shimmaps: 1st I used 3%CHCl3 in Aceton d6 (but I'm not sure this is the best sample to use due to the long relaxation time of the sample). Anyways, i created a new GSHIM file and new shimmapping. When runing Gradshimau Users experienced that they need to manualy shim (especially) Z2 due to the splitting of the peaks.

  1. The same procedure as above but with a sample that contained 90% D20 / 10% H20 + CuSO4, im attaching the shimmap that i created from this sample. the problem is stil that we end up with unwanted splitting due to poor Z2 shiming.

alt textalt text

Any sugestions on how to continue?

click to hide/show revision 4
No.3 Revision

posted Oct 27 '10 at 06:30

jonis's gravatar image

jonis
11

Gradshimau

I have a problem with gradshim (gradshimau) in topspin. The problem is that im getting spitting on solvent peak (and all other peaks as well) due to poor Z-Shimming.

I have tried 2 ways of creating new shimmaps: 1st shimmaps:

1 I used 3%CHCl3 in Aceton d6 (but I'm not sure this is the best sample to use due to the long relaxation time of the sample). Anyways, i created a new GSHIM file and new shimmapping. When runing Gradshimau Users experienced that they need to manualy shim (especially) Z2 due to the splitting of the peaks.

    2

  1. The same procedure as above but with a sample that contained 90% D20 / 10% H20 + CuSO4, im attaching the shimmap that i created from this sample. the problem is stil that we end up with unwanted splitting due to poor Z2 shiming.

alt text

Any sugestions on how to continue?

click to hide/show revision 5
No.4 Revision

posted Oct 27 '10 at 06:31

jonis's gravatar image

jonis
11

Gradshimau

I have a problem with gradshim (gradshimau) in topspin. The problem is that im getting spitting on solvent peak (and all other peaks as well) due to poor Z-Shimming.

I have tried 2 ways of creating new shimmaps:

1 I used 3%CHCl3 in Aceton d6 (but I'm not sure this is the best sample to use due to the long relaxation time of the sample). Anyways, i created a new GSHIM file and new shimmapping. When runing Gradshimau Users experienced that they need to manualy shim (especially) Z2 due to the splitting of the peaks.

2 The same procedure as above but with a sample that contained 90% D20 / 10% H20 + CuSO4, im attaching the shimmap that i created from this sample. the problem is stil that we end up with unwanted splitting due to poor Z2 shiming.

alt text

Any sugestions on how to continue?

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