{"id":4154,"date":"2025-01-21T19:15:05","date_gmt":"2025-01-22T03:15:05","guid":{"rendered":"https:\/\/www.rbdinstruments.com\/blog\/?p=4154"},"modified":"2025-01-21T19:15:07","modified_gmt":"2025-01-22T03:15:07","slug":"contact-issue-with-mcd-ceramic-on-phi-5600-xps-system","status":"publish","type":"post","link":"https:\/\/www.rbdinstruments.com\/blog\/contact-issue-with-mcd-ceramic-on-phi-5600-xps-system\/","title":{"rendered":"Contact issue with MCD ceramic on PHI 5600 XPS system"},"content":{"rendered":"\n

This blog post will show you how to repair a damaged 16 channel MCD anode ceramic on a PHI 5600 X-ray Photoelectron Spectrometer system.<\/p>\n\n\n\n

The MCD anode ceramic is part of the MCD (multi channel detector) assembly. The anode ceramic has 16 channels where electrons with slightly different energies are counted. The 16 channel detector offers a higher count rate as compared to the PSD (position sensitive detector) and single channel electron multipliers that were used on earlier XPS systems.<\/p>\n\n\n\n

There are surface mount resistors on the MCD anode ceramic that couple the positive (POS) voltage to the individual channel output ceramics. One of these surface mount resistors in particular provides the pathway for the multiplier POS voltage to the channel (chevron) plates. The POS contact is on both sides of the ceramic and they are connected via a gold plated through hole.<\/p>\n\n\n\n

It is possible that over time (or when the chevron plates are replaced) that the gold plated pad can become electrically open in which case there would be no voltage applied to the chevron plates and, therefor, no XPS signal.<\/p>\n\n\n\n

The picture below shows the location of the POS voltage gold plated through hole.<\/p>\n\n\n\n

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