Discussion List Archives

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [SA_scat] about RAT and Fixed tube x-ray generator

Choosing between rotating anodes and sealed sources:

the issues of beam stability and power consumption are minor issues
in this regard.  It sounds like you are building your own from

1.  the main plus for RA's is high flux for a given brightness.

2.  stability of RA's is not bad - a beam monitor, or other methods
    can compensate here.

3.  running costs (electricity) are higher, but maintenance costs
    are a much bigger issue here.  Consumables and breakdown costs
    are major items.  The engineering on RA's could be improved a LOT,
    but they are what they are. 

4.  the capital cost difference, excluding microsources, is about 4x

5.  commercial companies (Rigaku, etc) offer all three choices:  RA,
    std sealed sources, microsources and can give you relative

6.  there is no real substitute for checking actual performance
    yourself.  Try and visit somewhere that has what you want to buy
    and use it before using funds.

Stephen Henderson

--- On Sun, 5/22/11, Dr. Dillip Kumar Bisoyi <dkbisoyi@nitrkl.ac.in> wrote:

> From: Dr. Dillip Kumar Bisoyi <dkbisoyi@nitrkl.ac.in>
> Subject: Re: [SA_scat] about RAT and Fixed tube x-ray generator
> To: "Discussion list for the Small-Angle Scattering community" <sa_scat@iucr.org>
> Date: Sunday, May 22, 2011, 9:54 PM
> Dear Dr Suresh,
>  In my view fixed tube x-ray generator is best
> for stability and high resolution.
> Thanking you.
> > Hi, 
> > 
> > I am interested to learn about merits and demerits of
> present generation 
> > Rotating Anode Target (RAT) x-ray generator
> for SAXS in transmission 
> > geometry. I 
> > heard that beam
> stability of x-rays produced by RAT is very poor due to 
> > that it
> > hampers the resolution of SAXS and it consumes huge
> power. 
> > 
> > 
> > Advances in fixed tube x-ray generators
> coupled with advanced x-ray 
> > mirrors 
> > produces high
> brilliance x-rays. is this flux density really comparable 
> > with
> > modern RAT x-ray generators. 
> > 
> > With your
> experience, which x-ray generator is best, RAT or fixed
> tube. 
> >
> > With best regards and your advise is greatly
> acknowledged. 
> > 
> > Suresh 
> >
> _______________________________________________ 
> > sa_scat mailing
> list 
> > sa_scat@iucr.org
> >
> http://scripts.iucr.org/mailman/listinfo/sa_scatThis
> mail has been scanned
> > by Cyberoam based UTM at NIT, Rourkela. If your mail
> still
> contains virus 
> > forward it to "spam@nitrkl.ac.in"
> This email was sent using NIT Rourkela Webmail.
> "NIT Rourkela - Orissa "
> http://www.nitrkl.in/
> This mail has been scanned by
> Cyberoam based UTM at NIT, Rourkela. If your mail still
> contains virus forward it to "spam@nitrkl.ac.in"
> -----Inline Attachment Follows-----
> _______________________________________________
> sa_scat mailing list
> sa_scat@iucr.org
> http://scripts.iucr.org/mailman/listinfo/sa_scat
sa_scat mailing list

Reply to: [list | sender only]
International Union of Crystallography

Scientific Union Member of the International Science Council (admitted 1947). Member of CODATA, the ISC Committee on Data. Partner with UNESCO, the United Nations Educational, Scientific and Cultural Organization in the International Year of Crystallography 2014.

International Science Council Scientific Freedom Policy

The IUCr observes the basic policy of non-discrimination and affirms the right and freedom of scientists to associate in international scientific activity without regard to such factors as ethnic origin, religion, citizenship, language, political stance, gender, sex or age, in accordance with the Statutes of the International Council for Science.