[ Identification | Description | Input parameters | Links ]

The SAFARI_PITSI Instrument

Powder Instrument for Transition in Structure Investigations

Identification

• Site: Necsa
• Author: Deon Marais (deon.marais@necsa.co.za)
• Origin: Necsa
• Date: September 2013

Description

Necsa Neutron Powder Diffractometer located at beam port 5 of the SAFARI-1 research reactor, South Africa

Input parameters

Parameters in boldface are required; the others are optional.

Name	Unit	Description	Default
source_lam_min	Angs	Minimum wavelenth of source	0.5
source_lam_max	Angs	Maximum wavelenth of source	2.0
hi_res		Selects hi-resolution(1) or hi-intensity(0) reactor beam through primary shutter	0
mono_Si_type		Monochromator Silicon type options: 422 400 311 511 111 331 (Mostly used: 331 and 551)	551
mono_mosh	arc min	Monochromator horizontal mosaicity	30
mono_mosv	arc min	Monochromator vertical mosaicity	30
mono_dx	m	Monochromator delta x - positive to left of reactor beam	0
mono_dy	m	Monochromator delta y - positive upward of reactor beam	0
mono_dz	m	Monochromator delta z - positive along reactor beam	0
mono_takeoff	deg	Monochromator takeoff angle - positive anti-clockwise from reactor beam	90.0
mono_dtilt	deg	Monochromator tilt angle - not implemented yet	0
mono_r_h	m	Monochromator horizontal focus radius (min 5.0 m)	5.0
mono_r_v	m	Monochromator vertical focus radius (min 0.9 m)	3.572
port_takeoff	deg	Port takeoff angle - positive anti clockwise from reactor beam (70 or 90 deg)	90.0
inc_slit_rot	deg	Incident slit delta rotation - not implemented yet	0
inc_slit_dx	m	Incident slit delta x position - positive to left of incident beam	0
inc_slit_to_cor	m	Incident slit to sample stage center of rotation	0.01
inc_slit_width	m	Incident slit width 0.00013m to 0.006m	0.006
inc_slit_height	m	Incident slit height 0m to 0.05m	0.05
inc_slit_sep		Incident slit separation between width and height. <0:use emperical calc, >=0:distance in m	0
mono_to_cor	m	Distance between monochromator and center of rotation	2.5
sample_dx	m	Sample delta x - positive to left of incident beam if sample_dom=0	0
sample_dy	m	Sample delta y - positive upword of incident beam	0
sample_dz	m	Sample delta x - positive along of incident beam if sample_dom=0	0
sample_dom	deg	Sample delta omega - positive anti-clockwise from incident beam	0
det_takeoff	deg	Detector takeoff angle - positive anti-clockwise from incident beam	-114.375
cor_to_det	m	Distance between sample centre of rotation and detector	1.179
dangle_interest	deg	Delta angle of interenterest.	125
full_instrument			1

Links

• Source code for SAFARI_PITSI.instr.
• The South African Nuclear Energy Corporation website

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[ Identification | Description | Input parameters | Links ]

Generated on 2024-01-03 11:47:43

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Last Modified: Tuesday, 16-Apr-2024 20:05:21 CEST