Diagnosekomponenten
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Profilmonitor

Profilmonitor

Profilmonitor.

Profile monitor.

Profilmonitor

Profilmonitor.

Profile monitor.

Profilmonitor

Profilmonitor.

Profile monitor.

Intensity Monitor

Intensitymonitor

Fluorescence Monitor

Fluoreszenzmonitor

Fluoreszenzmonitor

Fluorescence Monitor



Beschreibungen

Profilmonitor

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Technische Beschreibung


The profile monitor is used for detecting beam profiles at a high spatial resolution.
GaAsP photodiodes (Schottky type) in a UHV-compatible design will be used as sensors. The resolution of 50 μm is achieved by pin holes of the same diameter installed before the photodiode.
For measurements in the white light mode a filter is installed before the pin holes and the diode. The cooled monitor head is made of OFHC copper and can be moved via a power-driven manipulator either in a linear motion or in two coordinates orthogonally to the beam. The manipulator stroke allows the use of three measuring points of selectable configuration as well as the complete removal of the monitor out of the beam. The expected photon flows will be measured using pico-ammeters.
Its overall transmission amounts up to 40%.

Technische Daten


Energy range: 1 keV … 20 keV

Diode type: GaAsP, Schottky type (Hamamatsu)

Active diode surface: 2.3 mm x 2.3 mm

Basic flange: CF 100

Monitor head: OFHC copper

Manipulator stroke: 100 mm vertical,
10 mm horizontal

Drive: stepping motor,
encoder with integrated references,
limit switch

Cooling: 2 symmetric circulations with OFHC copper pipe, Ø 6x1

Temperature measurement: 2 TC, K-type

Camera: CCD camera (monochrome) with lens
(optional motor zoom), 752 x 582 pixel
Camera – screen distance: approx. 500 mm

Photo-current measurement: 2 pico-ammeters (Keithley 6485 or equivalent)

UHV compatibility: yes


 

Intensity Monitor

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Technische Beschreibung


The intensity monitor is used for in-situ measurement of the photon flow and can be used in a broad energy range. Photons hit an isolated, stretched-out net which is connected to an ammeter, and generate an external photoelectrical effect.
Electrons leave the net and lead to an electrical current as a measure of the photon flow. In order to allow the use of different net materials and net dimensions the monitor has receptacles for two nets. The cooled monitor head is installed on a linear travel mechanism. Thus the two nets can be moved into different beam positions or completely removed out of the beam. In order to improve the electron yield the nets are BIAS-compatible.

Technische Daten


Energy range: 1 keV … 20 keV

Nets: tungsten, gold, copper, nickel

Net size: Ø 12 mm

Transmission: > 75 %

Electrical feedthrough: x floating shield

Basic flange: CF 100

Monitor head: OFHC copper

Manipulator stroke: 50 mm vertical

Drive: stepping motor, limit and reference switches

Cooling: OFHC copper pipe, Ø 6x1

Temperature measurement: TC, K-type

Photo-current measurement:
1 pico-ammeter (e.g. Keithley 6487 or equivalent)

UHV compatibility: yes


 

Fluorescence Monitor

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Technische Beschreibung


The fluorescence monitor generates a fluorescent radiation on a screen which can be monitored orthogonally to the synchrotron beam via a CCD camera outside the vacuum. The screen consists of a CVD-deposited diamond foil with a very high thermal conductivity. Thus this monitor can be used at very high thermal loads (> 1 kW). The monitor head is cooled. It can be adjusted to different beam positions using a power-driven linear drive or even completely moved out of the beam.
The fluorescent effect of CVD diamond is based on its residual doping with nitrogen atoms. As an alternative the screen can be delivered with a classic P43 coating in order to visualize weak photon flows (e.g. in monochromatized radiation). In-situ operation is possible because the diamond foil is just 0.15 mm thick.
Its overall transmission amounts up to 40%.

Technische Daten


Energy range: 1 keV … 20 keV

Active screen surface: 20 mm x 15 mm

Diamond foil thickness: 0.15 mm

Coating: w/o coating, P43, split screen: w/o coating and P43

Basic flange: CF 100

Monitor head: OFHC copper

Manipulator stroke: 50 mm

Drive: stepping motor, limit and reference switches

Cooling: 2 symmetric circulations with OFHC copper pipe, Ø 6x1

Temperature measurement: 2 TC, K-type

Camera: CCD camera (monochrome) with lens
(optional motor zoom), 752 x 582 pixel
Camera – screen distance: approx. 500 mm

UHV compatibility: yes