RE: Automated slits for Panalytical MPD

2009-12-08 Thread Cline, James Dr.
Sent: Tuesday, December 08, 2009 2:13 AM To: David Lee Cc: Russ Field; rietveld_l@ill.fr Subject: Re: Automated slits for Panalytical MPD The clear advantage of variable slit is to have more intensity at medium/higher diffraction angles, compared to fixed slit systems adapted to low starting a

Re: Automated slits for Panalytical MPD

2009-12-07 Thread Reinhard Kleeberg
The clear advantage of variable slit is to have more intensity at medium/higher diffraction angles, compared to fixed slit systems adapted to low starting angles. This is nice for quantitative Rietveld analysis of samples having important intensities at low as well as at medium/high angles, e.g

Re: Automated slits for Panalytical MPD

2009-12-07 Thread David Lee
The only advantage I see with a variable slit is that you keep a constant area on the surface. This gives a constant sampling volume for samples that are thin compared to the x-ray penetration depth. In contrast, the sampling volume is fixed with a thick sample and fixed slit for typical pow

Automated slits for Panalytical MPD

2009-12-07 Thread Russ Field
HI All I am seeking opinion on the installation of automated slits on a Panalytical MPD Pros and cons. Comments from a previous post are shown below by an esteemed colleague I see little use for varable divergence slits for all sorts of reasons (firstly as there is no rock solid conversion fr