(SANITIZED)UNCLASSIFIED SOVIET PAPERS ON THE PROPAGATION OF ELECTROMAGNETIC WAVES AND SURFACE STATES OF GERMANIUM(SANITIZED)

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP80T00246A015900050001-0
• Release Decision: RIPPUB
• Original Classification: C
• Document Page Count: 21
• Document Creation Date: December 22, 2016
• Document Release Date: November 8, 2011
• Sequence Number: 1
• Publication Date: April 10, 1962
• Content Type: REPORT

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Declassified in Part -Sanitized Copy Approved for Release 2011/11/08 :CIA-RDP80T00246A015900050001-0
 Declassified in Part - Sanitized Copy Approved for Release 2011/11/08: CIA-RDP80T00246A015900050001-0
T'i-l'~ -o ~ ~'~,~c T~v M ~ ~ !J ~2 C Wks
ON PROPAGATION IN A OACTI
PLAS1UfA AT BELOW THE PLASAdA FREQUENCY
V,I. Aksenov
1. Introduction
'Tke o ~ e ~Qa''4'co rtict t1Q ~+c w a vQ S
proBagation In a magnetoactive plasma
at below the plasma frequency is both an intriguing and a
pgorly investigated problem.
jhis seems to warrant a laboratory experiment for its
study. Q i iwt~Qa.Y' w~-odQ c0.Q~p~
Reference ~1j suggests he"'whistlez~?mode
~e~e-~- as a means for the diagnosis of a dense plasma
and describes a relevant experiment carried out on the
ZETA slow thermonuclear machine at Harwell, ~%ngland, The
specific features of such a machine inevitably complicate
experimentation.
After a discussion of some theoretical points, this
aut or suQgesta what he considers a simpler experi? ntal
arrangement for the observation of microwave mode propaga-
tion in a magnetoactive plasma at below the plasma frequen-
2, Some Pointe of 'theory
A homogeneous plasma in a :nagnetic field is a bi-re~-
Tractive medium, and its complex refractive index ~??~~,
for two characteristic waves ordinary and extraordinary)
will be gii~en by the equ~tion~~,'s
~ ~ T ,.. - K- .,, _. ,` 2
"~ N where (I ~ ~ ? f ~ , ~ N
?~ I (J_.li ~ ~ N is the plasma frequency;
~-a I l ~
H : L~., is the electron gyro frequency;
is the electron density;
Declassified in Part - Sanitized Copy Approved for Release 2011/11/08: CIA-RDP80T00246A015900050001-0
 Declassified in Part - Sanitized Copy Approved for Release 2011/11/08: CIA-RDP80T00246A015900050001-0
ie~he angle between th? wave normal and the magnetic
field j~
-n Q i h ~~t CQ e i pK is
Zn equation (1)~~which neglect , the
~z[t~k ?ub?oript '1' and the "-" sign at the root refer
to an extraordinary wave, while the subscript '2' and the
+" sign are related to an ordinary wave. In a general
case, equation (1) is too complicated for an investigation.
Theref?re, we make some simplifying assumptions. For one
thing, the collision frequency, ~ , is assumed small com-
pared with W , and the quantity Sin equation (1) neglig*ble
compared with unity. Secondly, we use what is known as the
nazi lon itudinal a ~~ 0 .
q - g pproximation n the basis of this
approximation which is valid for
? ~~~ ~ t r
when a 0, equation (1) may be replaced by a simpler
erpaesaion for Z
~, 2
where ~~ ~ 2 = ~ _ u~ '/~ '~ ( 5 )
2 ~,~ _ v-~ V U ~S ~
It should be noted that inequality (3) is valid for
relatively large ~ (50 to 60?), provided ~7~ 1 and ~j ~,
From n2 > Q and equation (4), it follows that charac-
teristic mode propagation may occur either when A~ 2)
or when A~~2 ~ 0. It may be shown that A~ 2 ~~ does not
satisfy the conditions of the quazi-longitudinal approximate
tion and ie therefore ruled out.
At A~ 2 < dand.for an extraordinary wave (subscript 1)
s
we have
bi?~
t
~
~
.
,
1 ~ ~~
i
C~~d ~ +
2 (~-~? cd~
Declassified in Part - Sanitized Copy Approved for Release 2011/11/08: CIA-RDP80T00246A015900050001-0
 Declassified in Part - Sanitized Copy Approved for Release 2011/11/08: CIA-RDP80T00246A015900050001-0
3.
In view of (3), the conditions in (6) may be approxi-
mated ae follows
1 < U u ? t~ dC
or 1 < ~
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Declassified in Part -Sanitized Copy Approved for Release 2011/11/08 :CIA-RDP80T00246A015900050001-0
 Declassified in Part -Sanitized Copy Approved for Release 2011/11/08 :CIA-RDP80T00246A015900050001-0
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Declassified in Part -Sanitized Copy Approved for Release 2011/11/08 :CIA-RDP80T00246A015900050001-0
 Declassified in Part -Sanitized Copy Approved for Release 2011/11/08 :CIA-RDP80T00246A015900050001-0
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Declassified in Part -Sanitized Copy Approved for Release 2011/11/08 :CIA-RDP80T00246A015900050001-0