VEB CARL ZEISS JENA PRODUCTION OF ELECTRON MULTIPLIERS

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP80-00810A007500890002-3
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 1
• Document Creation Date: December 21, 2016
• Document Release Date: June 3, 2008
• Sequence Number: 2
• Publication Date: August 3, 1955
• Content Type: REPORT

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