DISMOUNTABLE IONIC X-RAY TUBE FOR STRUCTURAL ANALYSIS

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP80-00809A000600280004-6
• Release Decision: RIPPUB
• Original Classification: C
• Document Page Count: 3
• Document Creation Date: December 22, 2016
• Document Release Date: October 12, 2011
• Sequence Number: 4
• Publication Date: January 9, 1950
• Content Type: REPORT

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SIFICI.TI iN C0173---MT.-AL {:
C;-jl ?.i_IGENCE AGENCY RE
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STATE KAW NSRB
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DISTRIBUTION
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Sanitized Copy Approved for Release 2011/10/12 : CIA-RDP80-00809A000600280004-6
SUBJECT Scientific- I-ray tureq
PUBLISHED Monthly pdriodice.i
WHERE
PUBLISHED Pk;scov
TNIt DOCNII(NT COflAtNS 1N/ONYATI ON A/C(OTIY.a TN! NATIONAL 0(IINn!
0, T%( DNITlD 1TATlf NITNIN TK( N(ANIKO 01 !O,IONAt! ACT t0
O. A. C , fl AND 11, Ai AYl NO(P. ITf TNdN(NIOIION ON TN(!(b ILATION
0/ ITt CONYINTi IN AN[ YANN[f t AN UNdbtNO*I!!O f!AfoI If INO
NIIDTDO BT LA V. NlfIODOC'ON OP 1.14 ,OCN !( UONIDITIO
DATE DIST. f Jan 1950
NO. OF PAGES 3
SUPPLEMENT TO
REPORT NO.
THIS IS UNEVALUATED INFORMATION
V. G. Prokhvat316T
To. I. Gindin
Soviet )xpert;i have devoted considerable attention to the development of
nev T-21ay tubes. (1;-5) Post taboo }:errected are of a specialized, higL-
Povered type, complex in both their manufacture and application, or tubes requir-
ing special apparatus for making the X-ray photographs.
The All-Union Conference on the Application of X-rays to Materials Research
meeting in Leningrad in 1948 noted the great need for perfecting an ionic X-ray
tube for structural analysie,;ii place of previously used tubes (6).
In structural analysis it is necessary to obtain the greatest possible con-
centration of Z-rage In order to cut down the exposure time. If the tube is of
normal power this increased intensity of X-rays may be achieved by. (1) attain-
ing a sharp focus of the tube (2.1 mm), and (2) decreasing the distance between
the'wik,d.ov of the tube and the focal point to a minima. Features of existing
conventional tubes prevent or limit the achievement of a sharp focus. V. I.
lasnilov (7) describes a modification which will permit movement of the focusing
unit without disassembling the tube, but it is adaptable only for oxperimentatiom.
In addition to simple design and high radiation intensities, an ideal X-ray
tube should provide Dimple centering of the cathode with respect to the anti-
cathode, different types of radiation, easy assembling and disassembling of the
tube, reliable vactu, with a minima of sealing material. and rapid operation.
In this connection, the new tube design proposed by 1s has the following
characteristicsri (1)a smaller distance between the anode ? rror and the outside
window, (2) a11I1A and nnnvaniant farm con+_-1 vial( + dl-S--arble_- is. _a.sz_
or disturbing the vacuum, (3) provision for easy adJuetment of the cathode posi-
tion in relation to the anticathode while the tube is in use, without disturbing
the vacuuln, (4) radiation intensity control vhile the tube is in use, without
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C0 IF7:7N'TIAL
diml,c?bing the vr..rum, ?.e-et fl_ a^tmm 33A.tre material, (6) small-
aize:d tube hc+. i:,o, (7) a aim lar Cool` ..im :;h a in tubes of the "Shedding"
The tube has three aluminum windows eea?jd with a mixture of beeswax and
rosin in eaur.l amounts. The distance from the niter surface of the window to
the cent( 'f. the anode mirror is 9 mgt; in the "D.adding"tube this distance
is 20 mm. The anticathode is inserted at one side of the tube perpendicular
to the cathode axis to permit control of the amount of radiation by its maipu
lai.ion. Surfaces of the tetrahedral anticat~icde measure 6 x 6 n@a, and each has
a oor.re.ponding anode mirror of 0.1-ma thickness, thus obtaining four different
The casing and cathode insulator are connected with an adjustable device
by which the cathode may be centered and the interval between it and the anode
varied in the range of 70-90 am. This device consistLi of a corrugated metal
tube ("eil'fon*), a flange, and the regulating scrowa. The lower end of the
a1YPon is soldered to the be caning and the upper end to the flange. Regu-
lating mews control the position of the cathode with relation to the anti;
cathode.
The focusing device conaiaTS of a 'Iit .lid ,;2 er= with .tt lower part soldered
to the cathode twtbc. A tight-fitting el minus ;tube (focusing cylinder) is attacked
to the lower and of '2.e net, and a stopp::? is ure*~_ded to control the raising and
lowering of the nut. To change focus, it is sufficient to cut off the high voltage
and turn the sleeve the necessary number of rotations (eo.ch turn raising or lolter-
ing the cathode 1 ma with a variation of 15 a poa:+ bl.e' An adapter, soldered to
the cathode tube, turns the otthode. Rubber share and the sleeves maintain the
vacuum and a water cooling chamber used in med.cal X-ray tubes is attached to the
cathode tube. The cathode insulator is a porcelain tube 30 mm long, glaled on
:otk sides, with catr and inner diameters of 50 and 40 mm, respectively. It is
.,upported by two flanges fastened on with litharge nuts.
The tube is ready to operate 1-2 hours after the pc.serabli.ng is started. OA
following days the starting time is 'Qetermited only by the starting tint o'_' the
high-vacuum pump. With a steam-oil, .lass pump, stable operation is obtained In
547 minutes.
3rposnres made with a 2-mm focus gave the following results: A Pepye-gram
of a copper specimen 0.9 mm in diameter (at 10 ma and 30 kv) was prepared in 5
minutes in a Debye chamber with a diameter c ,P mm (the distance from the
focus to tht apecimon as 69 am),
BIB1I00RAPRP
1. P. Strel'n4kc, "Jandbook on Application of Roentgenography to bhteriale
Research" (1936)
2. S. V. Sergeyev, Zhurnal Tekhnicheakoy Fiziki (Journal of Technical Physics),
Vol V, No 1, Pages 83-93 (1936)
3. F. I. Solov'yev, ZavodPka a Iaburatbrija (Plant laocuzstury), Vol III, No 10-11,
Pages 1121-1124 (1939)
4. L. V. A1'tshullor, Zavodekaya Laboratorlya, Vol IX, No 8, Pages 872-876 (1840)
CONFIDENTIAL
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6. V. A. Vitka, V. I. Zatulovek1y, N. K. Kozhina, and V. A. Tsukexmaan. nfl-
book on Arp lagt1cn of Rr, :denography to Vatorials Research" (1936)
7. V. I. D n11ov, "Uandbook on Appll~atlon of Roentgenography to Yater1els
Research" (1936)
sfirSlee
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