# PSD11: The 11th International Conference on Position Sensitive Detectors

3-8 September 2017
The Open University, Milton Keynes, UK.
Europe/London timezone

## Performance of the Lancelot Beam Position Monitor at the Diamond Light Source

7 Sep 2017, 11:00
20m
Berrill Lecture Theatre (OU) ()

### Berrill Lecture Theatre (OU)

The Open University, Walton Hall, Milton Keynes, MK7 6AA

### Speaker

Hassan Chagani (Diamond Light Source Ltd.)

### Description

The Lancelot beam position and profile monitor records the scattered radiation off a thin, low-density foil, which passes through a pinhole perpendicular to the path of the beam and is detected by a Medipix-RX sensor. This arrangement does not expose the detector to the direct beam at synchrotrons and results in a negligible drop in flux downstream of the module. It allows for magnified images of the beam to be acquired in real time with high signal-to-noise ratios, enabling measurements of tiny displacements in the position of the centroid of approximately 2 $\mu$m. A constant frame rate of up to 90 Hz is achieved. The results of measurements with two Lancelot detectors installed in different environments at the Diamond Light Source are presented and their performance is discussed.

### Primary authors

Hassan Chagani (Diamond Light Source Ltd.) Tomas B. Garcia-Nathan (University of Manchester) C. Jiang (University of Manchester) A. Kachatkou (University of Manchester) Julien Marchal (Institute Laue Langevin Grenoble) David Omar (Diamond Light Source) Roelof G. van Silfhout (University of Manchester) Dr Scott Williams (Diamond Light Source)