[RASMB] XLI absorbance problem

[Andrew Leech]

Hi all,

Perhaps there could be a problem with the wavelength drive in the
affected XL/I - if the drive rod is not working properly this would
account for the fact that the monochromator was ok in the other
machine. Tom's suggestion should show this up.

Best regards,

Andrew


On 24/02/2015 13:46, Laue, Thomas wrote:
> Hi-
> I suggest you take a wavelength scan on an empty hole and send along those results. The original intensity scans showed there was no (or very little) difference in intensity between the sample and reference sectors. This would be true if the wavelength were being reported incorrectly. The counterweight scan looks fine (though I agree that the intensity seems low), you can see the slight difference in the size of the holes. This would indicate that the timing and radial position calibration are OK.
> Best wishes,
> Tom
> ________________________________________
> From: RASMB [rasmb-bounces at list.rasmb.org] on behalf of Curth [curth.ute at mh-hannover.de]
> Sent: Tuesday, February 24, 2015 6:11 AM
> To: Andrew Leech
> Cc: rasmb at list.rasmb.org
> Subject: Re: [RASMB] XLI absorbance problem
>
> Hi Andrew,
>
> if I do an intensity scan of the counterbalance with our XL-I in
> continuous mode, I get similar intensities. In step mode, however, the
> intensities are much higher. So, if it was performed in continuous mode,
> the scan of the counterbalance looks fine to me.
>
> Best wishes,
>
> Ute
>
> --
>> Prof. Dr. Ute Curth
>> Hannover Medical School
>> Research Core Unit for Structural Analysis, OE 8830
>> Carl-Neuberg-Str. 1
>> 30625 Hannover
>> Germany
>
>> Tel.:+49-511-5329372
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-- 
Dr Andrew Leech                   *  Laboratory Head
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