Document Type: 
Document Number (FOIA) /ESDN (CREST): 
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Document Creation Date: 
December 21, 2016
Document Release Date: 
June 3, 2008
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Publication Date: 
August 3, 1955
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PDF icon CIA-RDP80-00810A007500890002-3.pdf77.5 KB
Approved For Release 2008/06/03: CIA-RDP80-00810A007500890002-3 INFORMATION REPORT INFORMATION REPORT CENTRAL INTELLIGENCE AGENCY This material contains information affecting the National Defense of the United States within the meaning of tie Espionage Laws. Title 18, U.S.C. Sees. 793 and 794, the transmission or revelation of which In any manner to an unauthorized person is prohibited by law. S..r~T COUNTRY East Germany _ REPORT SUBJECT VEB Carl Zeiss Jena Production of DATE DISTR. 3 August 1955 Electron bu1tipliers NO. OF PAGES DATE OF INFO. PLACE ACQUIRED DATE ACQUIRED REFERENCES This is UNEVALUATED Information REQUIREMENT NO. RD Laboratories at VEB Carl Zeiss Jena are working on electron multipliers for measuring the intensity of light of t9dark body" resistance (109 ..~- 108) o They are developing a new type of cell in which the anode comes out`of,the side of the tube. This technique now being ursued. is claimed to give a better over- all performance o., namely (1010 - 109)-,- 07). Yet another version under design has- a golingljacket which is calculated'to give a "dark 'body" resistance of 10 -- 10 f e Cathodes of cesium antimony and cesiwn 'oxide are being developed with windows of quartz; 2. Scintillation measurements can be made with these devices,, but Zeiss -is developing a special tube for this work. With this new tube,, direct light must not exceed 10- A, as above this intensity a reverse current is produced. If a higher intensity of light is essential for any partic4ar purpose, the bean must be chopped; Zeiss is now working on the necessary terrupter. Zeiss scientists are also designing a special tube for spectral inte ty in astronomical work. 3. Electron multipliers seen in development have stabilized power pact -- amplifier units, whose specifications are as follows$ 1800 - 2800 volts regulated; flow 0.05 mA;.surge lOmk; step voltage 100 - 150 volts stabs 0.001%. The amplifier does not indicate or record. S-ECC. E.T AIR (Note: Woshington distribution indicated by "X"; Field distribution by "#".) INFORMATION REPORT r ? REPORT Approved For Release 2008/06/03: CIA-RDP80-00810A007500890002-3