DEVELOPMENT OF GEIGER-MUELLER COUNTERS AT VEB TRANSFORMATOREN - UND ROENTGENWERK DRESDEN (TRARO)

Document Type: 
Collection: 
Document Number (FOIA) /ESDN (CREST): 
CIA-RDP80-00810A007400620010-4
Release Decision: 
RIPPUB
Original Classification: 
S
Document Page Count: 
5
Document Creation Date: 
December 21, 2016
Document Release Date: 
June 2, 2008
Sequence Number: 
10
Case Number: 
Publication Date: 
September 7, 1955
Content Type: 
REPORT
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PDF icon CIA-RDP80-00810A007400620010-4.pdf222.67 KB
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Approved For Release 2008/06/02 : CIA-RDP80-0081 OA007400620010-4 INFORMATION REPORT 25X1 This material contains information affecting the National Defense of the United States within the meaning of the Espionage Laws, Title 18, U.S.C. Secs. 793 and 794, the transmission or revel- ation of which in 25X1 any manner to an unauthorized SECRET person is prohibited by law. COUNTRY East Germany SUBJECT Development of Geiger-Mueller Counters DATE DISTR. at VEB Transformatoren - and Roentgenwerk, Dresden (TRARO) NO. OF PAGES DATE OF INFO. PLACE ACQUIRED DATE ACQUIRED THE SOURCE EVALUATIONS IN THIS REPORT ARE DEFINITIVE. THE APPRAISAL OF CONTENT IS TENTATIVE, (FOR KEY SEE REVERSE) 7 September 1955 1. In 1954, the development of various types of Geiger-Mueller radiation counters was completed by the Radiation Measurement Sub-Section of the X-Ray, Radiation,snd Mlectrioal TherapF Section of VEB Trans formatoren- und R?entgenwerk Dresden. This sub-section is headed by Eng. Frommhold (fnu) During 1954.90 Geiger-Mueller counters of all types were de- livered to the USSR. In 1955, 600 counters are to be delivered there, 2. The following are the types of Geiger-Mueller-counters so far developed by the Dresden enterprise: a, Type Series IA:This series consists of the types IA1, IA10, IA100, and IA300. The types IA1, IA10, and IA100 are used for counting X-rays and gamma rays from 20 keY to 3 MeV and for hard beta rays over 1 MeV. The type IA300 is used for counting X.-rays and gamma rays from 50 keV to 1 MeV. The tubes are made of glass with a small potassium content and are provided with a graphite layer cathode. The filling i elf extinguishing (SelVptloeachende Fuellung). The following table lists the technical data of the counter types of this series: has IA10 IA100 IA 00 Effective volume in cubic centimeters, about 1 10 100 300 Total length in-millime*ers 115 160 270 475 Largest diameter in millimeters 2 20 20 25 40 Wall"strength in mg/cm , about 35 35 35 140 Input voltage in volts 1,000 1,000 1,000 1,000 Minimum plateau length in volts 160 200 240 220 Plateau rise in % per:&00 volts Les s than Loco than Less Less th an D 10 8 than 5 5 ead tim& is micro-seconds 40 60 160 200 Zero effect in impulses per minute, about Mi i li 20 8 100 275 650 n mum fe term in impulses 10 8 in 8 10 8 25X1 .25X1 Approved For Release 2008/06/02 : CIA-RDP80-0081 OA007400620010-4 Approved For Release 2008/06/02 : CIA-RDP80-0081 OA007400620010-4 bo Tjga Series I 3B: This series consists of types 1319 IB10, and IB100. All three types can be used for the counting of X-rays and gamma rays over 20 YeT and hard beta rays over 1 MeT. They are particularly sensitive to I? Rays from, 60 keT to 120 keT. The counter tube is made of glass with a small potassium content and is provided with a cathode of precious metal. The filling is self-extinguishing. The following table lists the technical data of the counter types of this series: Type 131 -' 0 13100 Effective volume in labia osntimetere, about 1 Total length in millimeters 115 160 270 Largest diameter to millimeters 20 20 25 Wall strength in mg/am , about 35 35 35 Input voltage in volts 1,000 1,000 1,000 minimum plateau length in volts 160 200 240 Plateau rise in It per 100 volts Less than Less than Less than 4D 8 5 Dead time in micro-seconds 40 100 160 Zero effect in impulses per minute, about 208 1008 2758 Minimum life term in impulses 10 10 10 co Type Series IC* This series consists of types IC10, IC100, and IC300, Types IC10 and IC100 can be used for counting weak X-rays and gamma rays from 20 keT to 3 May and for hard beta rays ovfr 1 MoT. Type IC300 can be used for weak Z rays and gawa rays frpa 50 NOT to 3 meTo and in particular for cosmic radiation. The counter tube'is made of glass with a small potassium content and is provided with an outside layer cathode (Maze Counter). The filling is self-pztinguishing. The following table lists the technical data of the ooupter types of this series$ 10 i i 2 Effective volume in cubic oentiaskeis, about 10 100 300 Total length in millimeters 160 270 475 Largest diameter in millimeters 20 25 40 Wall strength in mg/on?, about ~3 35 140 Input voltage in volts 1,000 1,000 1,000 Minimum plateau length in volts 300 400 400 Plateau rise in % per 100 volts Less than Les; than Less than 8 5 3 Dead time in micro-seoond$ Zero effect in impulses per minute, about 70e 200e 6508 Minimum life term in impulses 10 10 10 d. Type Series IIBt This series consists of types II33, 113109 IIB100. They amt be used for counting X-rays and gamma rays from 50 keT to 3 MeT. The counter tube is made of glass with a small potassium content and is provided with a copper cathode 0.1 millimeter thick and nickel- ised by galvanization. The filling is self-extinguishing. The follow- ing table lists the technical data of the counter types of this serless IIB3 1810 II 1100 Type Effective volume in cubic centimeters, about 3 10 100 Total length in millimeters 115 145 270 Largest diameter in millimeters 20 25 30 Input voltage in volts 1,000 1,000 1,000 minimum plateau length in volts 160 200 240 Plateau rise in 0 per 100 volts Lose than Less than Less than 10 4 5 Dead time in secro.seaonds 50 10Q 160 Zero effect-in impulses per minute, about 20 1008 200 Minimum life term in.,ampulses 10 10 10 Approved For Release 2008/06/02 : CIA-RDP80-0081 OA007400620010-4 Approved For Release 2008/06/02 : CIA-RDP80-0081 OA007400620010-4 -3- e. Type Series IIC: This series consists of types IIC100 and IIC300. These types are used for counting hard gamma rays and cosmic rays. The counter tubes are made of glass with a small potassium content and are provided with a copper cathode 0.3 millimeters thick which is nickelized through galvanization. The filling is self-extinguishing. The following table lists the technical data of the counter types of this series: Type IIC100 110300 Effective volume in cubic omo, about 100 300 Total length in s llimeters 270 475 Largest diameter in millimeters 30 40 Input voltage in volts 1,000 1,000 Minimum plateau length in volts 250 250 Plateau rise in % per 100 volts Less than Less than 5 Dead time in micro-seconds 160 200 Zero effect in impulses per minute, about 160 400 Minimum life term in impulses 8 10 8 10 f. ape Series IV: This series consists of the following types: IVA10, IVC1O and IVE10. They can be used as interference counters for X-rays, with wave lengths from 1 to 2 angstrom units. The counter tubes are made of glass with a small potassium content and are provided with a radiation window. The filling is self-extinguishing. The window ma- terial of type IVA1O is Lindemann glass, that of IVC10 is silicate glass and that of IVZ10 is mica. The window diameter is 10 millimeters for all three types. The following table lists the technical data of the counter types of this series: Sffeotivs volume in cubic cm, about Total length in millimeters Largest diameter in millimeters Wall strength in ^g/oa2, about Input voltage in volts Minimum plateau length in volts Plateau rise in % per 100 volts V~ 0~ ~ V~ 1 10 10 150 165 150 25 25 25 250 20 50 1,000 1,000 1,000 250 250 250 Less than Less than Less than 5 5 5 Dead time in micro-seconds 100 100 100 Zero effect in impulses per minute, about 1008 1008 1008 Minimum life term in impulses 10 10 10 3. The appended sketch shows okelun diagrams of tho counter tubes with the essential dimensions indio4 e n millimeters* "B" is the diagram for types IA300, IC300 and 110300, "A" is the diagram for all other types mentioned in this report. 'SIE ctlf'l "(I F()flt4 Approved For Release 2008/06/02 : CIA-RDP80-0081 OA007400620010-4 Approved For Release 2008/06/02 : CIA-RDP80-0081 OA007400620010-4 4 Ddaos of Osig.a i ller Coimtsrs (AU divsneione in millimstere) 68 30 Approved For Release 2008/06/02 : CIA-RDP80-0081 OA007400620010-4 Approved For Release 2008/06/02 : CIA-RDP80-0081 OA007400620010-4 Approved For Release 2008/06/02 : CIA-RDP80-0081 OA007400620010-4