[ Identification | Description | Input parameters | Links ]

# The `PreMonitor_nD` Component

Neutron parameters spatial cross-correlation monitor.

## Identification

- Site:
- Author: Emmanuel Farhi
- Origin: ILL (France)
- Date: 01st Feb 2001.

## Description

    Neutron parameters are stored when entering in the PreMonitor.
    If this neutron then reaches the associated Monitor_nD, this latter
    component measures the previously stored parameters. This enables to study
    correlations between a given parameter in one place of the instrument
    and an other detection position in the instrument.

    The  neutron state is monitored at the previous component location.

    EXAMPLES:
    Here follows a Phase-Space correlation diagram detector
    (used for guides for instance)

    MyPreMonitor = PreMonitor_nD(
    monitor_comp = MyMonitor)

    (... for instance a Guide ...)

    MyMonitor = Monitor_nD(
    xmin = -0.1, xmax = 0.1,
    ymin = -0.1, ymax = 0.1,
    options = "hdiv x, auto, use premonitor");

## Input parameters

Parameters in boldface are required; the others are optional.

Name | Unit | Description | Default |
monitor_comp | no quotes | name of the associated Monitor_nD where the detection should take place |  |

AT ( | , | , |  | ) RELATIVE |  |
ROTATED ( | , | , |  | ) RELATIVE |

## Links

- Source code for `PreMonitor_nD.comp`.
- Monitor_nD

[ Identification | Description | Input parameters | Links ]