Hi,
(Am posting to the Rietveld list instead of the neutron list as would
like the following to focus on powder neutron diffraction (and hopefully
avoid/minimize any theological style arguments))
Can people recommend companies that sell rotary systems holding four
vertical focussing monochromators for neutron diffraction applications
(and can sell the whole thing, including monochromators, as an entire
integrated computer controllable package).
Based on an old GMI (Grenoble Modular Instruments) sales manual, we are
probably looking for the equivalent of the "4 MAVB", and a "mounting
system". Minimum spec for the monochromators would be vertical "fixed"
focus monochromators (variable focussed is not required).
For local floor geometry and experimental reasons, we like to operate
the Chalk River C2 neutron powder diffractometer at a monochromator
takeoff angle of 92.75 degrees (the maximum 2-theta for the C2 detector
is 115 degrees). We are considering the following four monochromators
for the system:
Wavelength (Angstrom) at 92.75 degree takeoff angle
si 531 1.329058
si 311 2.370718
si 111 4.539598
si 551 (or better material to give around 1 Angstrom neutrons)
1.101010
The Monochromator housing has a 16" radius.
Despite silicon's odious reputation as a neutron monochromator material,
we have "crushed" silicon monochromator material - and find it does an
effective job (this would be available if the vendor did not have good
reflectivity silicon material).
Thanks in advance,
Lachlan
--
-----------------------
Lachlan M. D. Cranswick
Contact outside working hours /
Coordonnees en dehors des heures de travail:
NEW E-mail / courriel: lc *at* bluehaze.com.au Home Tel: (613) 584-4226
Mobile/Cell: 613 401 3433 WWW: http://lachlan.bluehaze.com.au/
P.O. Box 2057, Deep River, Ontario, Canada, K0J 1P0
(please use clear titles in any Email - otherwise messages might
accidentally get put in the SPAM list due to large amount of junk
Email being received. If you don't get an expected reply to any
messages, please try again.)
(Essayez d'utiliser des titres explicites - sans quoi vos messages
pourraient aboutir dans un dossier de rebuts, du fait de la quantite
tres importante de pourriels recue. Si vous n'obtenez pas la reponse
attendue, merci de bien vouloir renvoyer un message.)
