CEM Models / Arrays
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Characteristics of CEMs in Arrays

 

 

 

 

 

  Standard CEMs    
  Typical gain at 2.3 kV applied voltage
1 x 10e8
  Typical wall resistance / channel Mohm 200
  Pulse height resolution at 2.6 kV and 3.000 cps % < 40
  Dark count rate above a threshold of - 5 mV / channel cps < 0.02
  Maximum count rate / channel cps 5 Mio
       
  Extended Dynamic Range type CEMs    
  Typical gain at 2.8 kV applied voltage   1 x 10e8
  Typical wall resistance / channel MOhm 60
  Pulse height resolution at 2.8 kV and 3.000 cps % <80
  Dark count rate above a threshold of - 5 mV / channel cps
< 0.02
  Maximum count rate / channel
cps
15 Mio
   
   
 

In addition to the standard CEM models, we also offer flat rectangular CEMs which can be stacked together to form arrays and which allow simultaneous measurements and read out of several sensors. The metalized contact areas are usually deposited on the narrow under and upper side of the CEMs. The outputs and therefore the anodes for CEMs smaller than 4 mm are positioned off-center. This increases the distance between adjacent anodes and therefore reduces possible crosstalk between the signal lines.

   
   
 
Selection Guide CEM arrays
 
CEM array model

KBLA210-5 with 5 channels of 2 x 10 mm opening

 
KBLA210-5
KBLA510-5 with 5 channels of 5 x 10 mm opening
 
KBLA510-5
KBLA1505-5 with 5 channels of 5 x 10 mm opening
 
KBLA1505-5
KBLA1010-5 with 5 channels of 10 x 10 mm opening
 
KBLA1010-5
KBLA1503-5 with 5 channels of 15 x 3 mm opening
 
KBLA1503-5
 
 
 
 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 
Replacement of a CEM array for an OMICRON EA125 Energy Analyzer
 
     
 
This example shows the replacement of old glass Channeltrons™ for an OMICRON EA125 Energy Analyzer and the extension from 5 to 7 CEMs model KBLA125EA-7
 
         
 
 
 
         
 
Fig. 12 Original CEMs in EA125
 
Fig. 13 Original slits for 5 CEMs
 
         
 
 
 
         
 
Fig. 14 Replacement CEM array
 
Fig 15 New slits for 7 CEMs
 
         

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fig. 1 CEM array model KBLA210-5
 
Fig. 2 CEM array model KBLA510-5
 
Fig. 3 CEM array model KBLA1505-5
 
 
Fig. 4 CEM array model KBLA1010-4
 
 
Fig. 5 KBLA_IPP_9 with 9 channels and 3 different openings
 
 
Fig. 6 KBLA1707_6 with front plate
 

 
Fig. 7 Compact Neutral Particle Analyser CNPA-03
Ioffe Institute, St. Petersburg
 
 
Fig. 16 Replacement CEMs with multi anode
 
 
Fig. 17 Mounted array with 7 CEMs
 
 
 
Fig. 22 ESCALAB220 iXL CEM models
 
 
Fig. 23 CEM Model KBL220ESCALAB
 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Replacement of a CEM array for VG CLAM 4 Electron Spectrometer

  As a special service we offer the replacement of old glass made CEMs by CEMs Series KBL for electron spectrometer. This example shows the replacement for a VG CLAM4.  
         
 
 
 
         
 
Fig. 8 Original CEMs made entirely of glass
 
Fig. 9 CEM array before replacement
 
         
 
 
 
         
 
Fig. 10 Replacement CEMs type KBL1707
 
Fig. 11 New CEM array
 
         

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A CEM array for a VG Thermo ESCALAB220 iXL X-ray Spectrometer

 
     
 
This sample shows the replacement of old glass CEMs for a VG Thermo ESCALAB220 iXL X-ray spectrometer by our CEM model KBL1507
 
         
 
 
 
         
 
Fig. 18 Original CEMs
 
Fig.19 CEM array before replacement
 
         
 
 
 
         
 
Fig. 20 Replacement CEMs Model KBL1507
 
Fig. 21 New CEM array
 
         

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


Dr. Sjuts Optotechnik GmbH

Am Schlehdorn 1, 37077 Goettingen, Germany Tel. + 49 (0) 551 209 95 62, Fax. + 49 (0) 551 209 95 63