Rutgers Ultraviolet Detector Lab

DQE Chamber for measuring DQEs at wavelengths between 1200 and 3000 Angstroms.

 

The manipulator controls for the PMT can be seen at the left. PMTs are sensitive to the angle of incidence of the radiation and to image location across the PMT. The manipulator allows a mapping of the PMT orientation and position to find the most stable PMT performance. The PMT can then be flipped in and out of the beam, maintaining this best performance orientation. The port facing the front of the chamber is the location where the NIST standard photodiode and subsequently the detector to be evaluated are attached. The orientation of the beam can be adjusted using the associated micrometers. The chamber can seal to a faceplate or attach to a housing holding the detector.

Extreme Ultraviolet DQE chamber

 

This Extreme Ultraviolet DQE chamber consists of a McPherson 247 grazing incident monochromator for operation over 5 to 120 nm. The light source at the left is a hollow cathode lamp shown with Ar gas source attached. The system operates in a windowless mode with gas from the lamp having to be preferentially pumped by a diffusion pump under the table. The detector or the NIST standard sensor are attached at the right and wavelengths are selected by moving the detector along the Rowland circle track.

Visible Light Rejection Test

 

An Oriel monochromator and matched light sources (left outside of the box) are used to send a selected wavelength (color) of light into a light tight box housing a detector and power supply. Observations are to compare the signal levels from a calibrated detector against the signal levels from the detector of interest. Test results are good to one part in 10 million under ideal conditions. Shown is the platform operation where a pick off mirror is used to send the beam down to a horizontal detector (not pictured). On the platform are micropositioners to make electrical contacts to wafers that may eventually become packaged detectors.

Electro-Static Discharge Station

 

Pictured are environmentally controlled storage containers and the Electro-Static Discharge (ESD) station. All the storage areas have UV blocking windows. Two have slow nitrogen purges to maintain low relative humidity and the large stainless steel container is also ohmically grounded. Devices can be removed from it and moved to the ESD station while the investigator remains grounded. The station is equipped with an ohmically grounded mat and a neutralizing blower. A filtered ESD air gun is used to remove small particulates if necessary. Once a device has been prepared for testing, the researcher can use foot straps and the ohmically ground mats to transport the detector safely to the test station.