CEM Models / Custom design
Home Introduction CEM Models CEM Handling Quality Assurance Measurement System MEASAR




Custom made CEMs




Fig. 1 Twin headed CEM
Fig. 4 CEM model KBL15RS/90_H
Fig. 7 KBL428 for Omicron SPA LEED
Fig. 10 CEM model KBL210_GV
Fig. 13 CEM model KBL15RS_135
Fig. 16 CEM Model Belz_Op_2
Fig. 19 CEM model 202
Fig. 22 KBL10RS/HZB
Fig. 18 KBL15RS_HMI
Fig. 19 NEPTUN/TRITON Ion Counter
Fig. 20 Typical peak shape and peak overlap of the U isotope signals on the ion counters




In addition to detectors with standard dimensions, we also offer custom-designed CEMs adapted to the corresponding requirements. The pictures on this page are examples of such detectors. All CEMs fulfill the electro-optical specifications for the standard and EDR types and are delivered with a final test sheet. We would be happy to build a customized detector for you that fits exactly into your measuring unit, whether as a single piece or as a large series.


Fig. 2 CEM model KBL10RS_MPS
Fig. 3 CEM model KBL1707_Delta
Fig. 5 KBL510/90 for SPECS SPA LEED
Fig. 6 CEM model KBL720/90
Fig. 8 CEM model KBL10RS_short
Fig. 9 CEM model KBL10RS_long
Fig. 11 CEM Model Kir_V2
Fig. 12 CEM Model Tou_V2
Fig. 14 CEM Model Kir_V1
Fig. 15 CEM Model MPS_V2
Fig. 17 Stop CEM JNA
Fig. 18 Start CEM JNA
Fig. 20 CEM model 205Trap
Fig. 21 MPS Jupiter
Fig 17. Electron optic with KBL15RS_HMI


  User Report
Courtesy of Johannes Schwieters


Thermo Fisher Scientific GmbH, Bremen
  U isotope abundance measurement  

The graphics show U isotope abundance data from a single uranium oxide particle measured using multiple ion counters in a Finnigan TRITON. The high detection power of the multiple ion counter arrays was employed to search for anomalous 233U/238U and 236U/238U isotope abundance ratios. All errors are within counting statistics. The 238U count rate decreased steadily from 70,000 cps to 15,000 cps over the six runs. Each run lasted 15 min. The measured 236U/238U isotope abundance ratios are on the same



Measured 236U/238U isotope abundance

order as the abundance sensitivity at two mass units spacing and are at the limits of detection. The magnetic sector mass spectrometer has evolved into a sophisticated high resolution, multicollector instrument capable of measuring isotope abundance variations with extreme levels of precision and, if carefully applied, accuracy. Improvements in detector technology from analog current amplifiers to sophisticated ion counting detectors open the possibility to analyze smaller and smaller sizes.




Measured 233U/238U isotope abundance























































































































































Dr. Sjuts Optotechnik GmbH

Rudolf-Wissell-Str. 14, 37079 Goettingen, Germany Tel. + 49 (0) 551 209 95 62, Fax. + 49 (0) 551 209 95 63, Email: sjuts@t-online.de