[ 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

[ Identification | Description | Input parameters | Links ]