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XANDY

Diamond XBPM

®

Readout System

XANDY is the readout system for X-ray

beam monitoring in Synchrotron Light

Sources. XANDY is used for X-ray

beam diagnostics in combination with

the CIVIDEC Diamond XBPM

®

.

It is configured for experimental beam

lines for high-precision X-ray beam

position and beam intensity monitor-

ing. It provides real-time diagnostics

with 24 bit resolution and sampling

rates up to 1 MHz.

XANDY is controlled remotely via

EPICS or TANGO and a Web-interface

with GUI is also available. A PID

controller for beam position control is

provided using two 16-bit DAC

outputs.

System features

Resolution

Sampling rate

Amplifier

Bias supply

GUI

Control system

DAC feedback

24 bit

1 Hz 1 MHz

1 pA 1 mA

0 50 V

Webbased

API integration

2x 16 bit 10 V

Amplifiers are included in XANDY. They have a

working range from 1 pA to 1 mA per channel.

The analogue bandwidth can be customised up

to 10 kHz.

The amplifiers are designed to protect the gap of

the Diamond XBPM

®

Detector from damage in

the case of high beam loads. They provide

excellent linearity, low noise and enable a

position resolution of 1e-4.

The Diamond XBPM

®

Detector is a four

quadrant beam intercepting detector. It is based

on electronic grade sCVD diamond. A thickness

of 20 µm is available for soft and tender X-rays

and 50 µm for hard X-rays.

The precision is determined by the 2 µm gap.

This small gap allows the measurement of

sub-micrometre beams. A parking position is

available for surpassing the X-ray beam without

No controller With controller

Drifting beam

Stabilised beam

CIVIDEC Instrumentation GmbH

interference. The Diamond XBPM

®

is mounted in

a solid metal housing.

A measurement was performed at MAX IV

Laboratory at the NanoMAX Beamline to test the

Diamond XBPM

®

in combination with XANDY. The

integrated PID controller of the XANDY was

tested (in collaboration with beamline scientist

Sebastian Kalbfleisch).

The feedback was applied via two analogue DAC

output channels to control the beam position.

Results are shown below (courtesy Sebastian

Kalbfleisch, MAX IV). The drifting beam is shown

on the left side and the stabilised beam on the

right side.

The precision of the stabilised beam is below

362 nm (RMS) with a beam size of 150.2 µm

(FWHM).

Figure. Beam position

with and without using

the XANDY readout

system courtesy

Sebastian Kalbfleisch

MAX IV