At line 199 added 28 lines. |
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+ !!Lambda/2 mode |
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+ To use Lambda /2 neutrons without changing A2 just divide the monochromator d-spacing by a factor of 2, i.e. go from 3.354 A to 1.677 A |
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+ > tasub mono dd 1.677 |
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+ > tasub update |
+ |
+ |
+ Next drive Ei and Ef to 4 times the initial energy. |
+ For example for 5 meV = 4.04 A drive Ei and Ef to 20 meV =2.02 A |
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+ Note, that the primary instrument, i.e. the monochromator will not move. The analyzer however will move, so make sure that any field from a magnet is set to zero. |
+ |
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+ To go back to 5 meV |
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+ > tasub mono dd 3.354 |
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+ > tasub update |
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+ |
+ |
+ ---- |
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- counter getthreshold 1 |
+ el737 threshold |
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- counter setthreshold 1 value |
+ el737 threshold value |
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- Typical values are 20 to 50. |
+ Typical values are 20 to 100. These numbers roughly correspond to the proton current on SINQ. |
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+ In case of problems with the communication between sics and sea you can try the following. |
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+ In sics use the command connect_sea. |
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+ In sea try the command connect_sics |
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+ |