[ Identification | Description | Input parameters | Links ]

# The `TAS1_C1_Tilt` Instrument

The conventional cold-source triple-axis spectrometer TAS1 at Risoe National Laboratory used as a diffractometer for a collimator tilt alignment.

## Identification

- Site: Risoe
- Author: A. Abrahamsen, N. B. Christensen, and E. Lauridsen
- Origin: Risoe
- Date: 1998

## Description

    This instrument is the conventional cold-source triple-axis spectrometer TAS1
    at Risoe National Laboratory. It does not exist anymore, but was used as the
    first detailed work performed with the McStas package.
    Here it is used as a diffractometer for a collimator tilt alignment. The
    detector is at the sample position and there is no analyzer.

## Input parameters

Parameters in boldface are required; the others are optional.

Name | Unit | Description | Default
PHM | deg | Monochromator arm angle, aka A1 | -37.077
TTM | deg | Monochromator take-off angle, aka A2 | -74
C1 | min | Collimator 1 aperture (mono-sample arm) | 30
OMC1 | deg | Tilt angle of the Collimator 1 | 5.5

## Links

- Source code for `linup-2.instr`.
- The McStas User manual
- A. Abrahamsen, N. B. Christensen, and E. Lauridsen. McStas simulations of the TAS1 spectrometer. Student's report, Niels Bohr Institute, University of Copenhagen, 1998.

[ Identification | Description | Input parameters | Links ]