[ Identification | Description | Input parameters | Links ]

# The `RTP_SANS` Instrument

The SANS instrument installed at Reactor TRIGA PUSPATI (Malaysia)

## Identification

- Site: TRIGA
- Author: E. Farhi and Megat Harun Al-Rashid
- Origin: ILL/RTP
- Date: June 2014

## Description

    This is a 4m long SANS installed on a radial beam port 4 at the Reactor TRIGA
    PUSPATI (RTP). Te beam port 4 is a radial tube that originates from the core,
    through the graphite reflector. A thick Be filter selects the cold tail of the
    thermal spectrum, and removes higher order PG reflections.
    A PG(002) monochromator selects the 5A neutrons that are sent into a 4m - 4m
    SANS with a 60 cm PSD detector 128x128 pixels.
    The monochromator is here used in fixed double focusing geometry.
    The accessible Q range is then 0.01-0.1 Angs-1.

    This model contains a detailed description of the Be filter, monochromator
    and SANS set-up. The Be filter is in the monochromator block.

    Example: mcrun RTP_SANS.instr lambda=5

## Input parameters

Parameters in boldface are required; the others are optional.

Name | Unit | Description | Default
lambda | Angs | monochromator selected wavelength | 5
DM | Angs | d-spacing for the monochromator reflection | 3.355
dlambda | Angs | monochromator wavelength spread | .2
Be_Filter_depth | m | Depth of Be filter | .15
Mono_tilt | deg | angle tilt between the 3 monochromator layers | -1
mono_rotation | deg | additional monochromator offset rotation for e.g rocking curves | 0

## Links

- Source code for `RTP_SANS.instr`.
- Nuclear Malaysia
- M. Sufi et al., J. AppL Cryst. (1997). 30, 884-888 [doi:10.1107/S0021889897001738]

[ Identification | Description | Input parameters | Links ]