CEM Models / Custom design
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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
(J.Schwieters)
 
 
JupiterMercury

 

 

 

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

Am Schlehdorn 1, 37077 Goettingen, Germany Tel. + 49 (0) 551 209 95 62, Fax. + 49 (0) 551 209 95 63, Email: sjuts@t-online.de