Elektron-2 measurements of upper limits of ion temperatures between 7000 and 30,000 k

Bezrukikh, V. V.

Breus, T. K.

Gringauz, K. I.

Breton 

NASA Technical Reports Server

E 
b- R 
National Aeronautics and Space Administration 
Goddard Space Flight Center 
Contract No.NAS-5-12487 
ST-PF-IF-10664 
ESTIMATES OF THE UPPER LIMIT OF 
ION TEMPERATURF: IN THE 7000-30000 KM 
ALTITUDE RANGE ACCORDING TO MEASUREMENTS 
ABOARD AES "ELEKTRON-2 
V.V. Bezrukikh 
T . K .  Breus 
K.1, Gringauz 
(THRU) 
=! 
GPO PRICE $ 
29 DECEMBER I967 CFSTl PRICE(S) 8 
Microfiche (M F) -L225z- 
ff 653 Julv 85 
https://ntrs.nasa.gov/search.jsp?R=19680005705 2020-03-12T12:06:31+00:00Z
t . - 
ST-PF-IP-10664 
ESTIMATES OF THE UPPER L I M I T  O F  
I O N  TEMPERATURE I N  THE 7000-30000 KM 
ALTITUDE RANGE ACCORDING TO MEASUREMENTS 
ABOARD AES "ELEKTRON-2" 
Kosmicheskiye I s s l e d o v a n i y a  
Tom. 5 ,  vyp. 5 ,  798-799 
Izd-vo "Nauka", I967 
SUMMARY 
by V.V. Bezrukikh  
T.K.  Breus 
K . I .  Gr ingauz  
E s t i m a t e s  of t h e  upper  l i m i t  o f  i o n  t e m p e r a t u r e  i n  t h e  
7000-30000 km. a l t i t u d e  range  are made w i t h  t h e  a i d  o f  an 
ear l ie r  d e s c r i b e d  method, u s ing  t h e  d a t a  of  col lector  c u r r e n t  
v a r i a t i o n s  of  t h e  cha rged  p a r t i c l e  t r a p ,  hav ing  a z e r o  poten-  
t i a l  i n  t h e  o u t e r  g r i d  because of  s p a c e c r a f t  s p i n n i n g .  
* 
* * 
T h i s  method w a s  d e s c r i b e d  i n  r e f e r e n c e  [ l ] .  I t  a l l o w e d  
t h e  measurement of i o n  t e m p e r a t u r e  p r o v i d e d  t h e  d e v i c e ' s  o r i e n -  
t a t i o n  re la t ive t o  s p a c e c r a f t ' s  v e l o c i t y  vector i s  known, and 
t h e  o b s e r v a t i o n s  are conducted u n i n t e r r u p t e d l y .  
I f  t h e s e  c o n d i t i o n s  are n o t  f u l l f i l l e d  as i s  t h e  case, 
f o r  example,  i n  t h e  expe r imen t s  on "E lek t ron -2" ,  o n l y  t h e  upper  
l i m i t  of i o n  t e m p e r a t u r e  c a n  be e s t i m a t e d  by t h e  maximum d i f f e -  
r e n c e  f o r  t h e  g iven  r e g i o n  i n  t h e  v a l u e s  of  t h e  c o l l e c t o r  c u r r e n t ,  
modula ted  by s a t e l l i t e  s p i n n i n g .  
The r e s u l t s  of estimates made by t h e  above method aboa rd  
"E lek t ron -2"  i n  J a n u a r y  I964 are as f o l l o w s :  
where R i s  t h e  g e o c e n t r i c a l  d i s t a n c e  i n  E a r t h ' s  r a d i i  RE. 
i o n  (T.) t e m p e r a t u r e s  a t  such s u b s t a n t i a l  d i s t a n c e s  f r o m  t h e  
E a r t h  t t h rough- I4  RE) among t h e  p u b l i s h e d  ones  w e r e  o b t a i n e d  
w i t h  t h e  a id  of a cha rged  p a r t i c l e  t r a p  on AES "IMP-2" [2 ,3 ]  
(refer t o  F i g . 1 ) .  
The o n l y  r e s u l t s  of measurements of e l e k t r o n  (Te)  and 
.. 
I 
I 
1 -  
2 
yea r  and p r e t t y  close i n  s e a s o n .  
During t h e  comparison t h e  geomagnet ic  
I t  may be  s e e n  from t h e  f i g u r e  
t h a t  t h e  upper  l i m i t s  o f  i o n  tempera-  
w e l l  w i t h  t h e  r e s u l t s  of  measurements 
- 3 environment w a s  t a k e n  i n t o  accoun t .  
- t u r e  o b t a i n e d  from E lek t ron -2  a t  va- - - r i o u s  d i s t a n c e s  f r o m  t h e  E a r t h  a g r e e  
- a r e  s u b s t a n t i a l l y  lower  t h a n  t h e  i o n  
- 
X ' 3  
- 0 4  
- * 5  
+~ooo *:O&q 
3 
-i 
0 
- of e l e c t r o n  t e m p e r a t u r e  on IMP-2, b u t  
- t empera tu res  measured on t h e  l a t t e r .  
I t  f o l l o w s  from t h e  e x p e r i m e n t a l  
d a t a  r e l a t e d  t o  t h e  r e g i o n  of h e i g h t s  
1 9  . I  
3 
pancy o f  t h e  r e s u l t s  of o u r  estimates w i t h  t h e  d a t a  on Ti i n  
t h e  works [2,31 i n  t h e  same a l t i t u d e  r e g i o n ,  where measurements 
on "IMP-2" o v e r l a p  w i t h  t h e  estimates of  t h e  uppe r  l i m i t  of Ti 
a c c o r d i n g  t o  d a t a  of "Elektron-2" [see F i g . 1 1 ,  s t i l l  remains  
o b s c u r e .  
t h e s e  d i s c r e p a n c i e s ,  namely t h e  d i f f i c u l t y  of p r o c e s s i n g  t h e  
vol t -ampere  c h a r a c t e r i s t i c s  o f  t h e  t y p e  shown i n  F i g . 2  of work 
[ 2 ]  and  F i g . 3 ,  4 of t h e  w o r k  [31 l i n k e d  w i t h  t h e  n e c e s s i t y  of 
d e t e r m i n i n g  t h e  i n c l i n a t i o n s  of vol t -ampere  c h a r a c t e r i s t i c s  by 
v e r y  scarce p o i n t  o b t a i n e d  wi th  one v o l t  v a r i a t i o n  i n t e r v a l s  of 
t h e  v a l u e s  of p o t e n t i a l .  
W e  may p o i n t  t o  one of t h e  p o s s i b i l i t i e s  of e x p l a i n i n g  
* * * THE END * * * 
R E F E R E N C E S  
[ l ]  K . I .  Gr ingauz ,  V.V. Bezrukikh,  T . K .  Breus.  
Kosmich. i s s l e d . ,  5 ,  N o . 2 ,  245, 1967.  
[ 2 ]  G . P .  Se rbu ,  E . J . R .  Maier. 
J. Geophys. R e s . ,  7 1 ,  No.15, 3755, 1 9 6 6 .  
[31 G . P .  S e r b u ,  E . J . R .  Maier. 
Space R e s . ,  7 ,  North Hol land  Publ .  Co., 
Amsterdam, 1 9 6 7 ,  p .  527. 
[ 4 1  J . V .  Evans.  Usp. f i z .  n . ,  9 2 ,  vyp. 2 ,  2 2 9 ,  1967. 
[ 5 ]  K . I .  Gr ingauz .  Usp. f i z .  n . ,  9 2 ,  vyp. 2 ,  207, 1967. 
[61 J . V .  Evans,  D.T. Fa r l ey .  
E l e c t r o n  Dens i ty  P r o f i l e s  i n  Ionosphe re  
and Exosphere.  E d i t .  by J o n  F r i h a g e n ,  
North Holland Pub l .  Co., Amsterdam, 1966,  
p .  399, 4 4 6 .  
[ 7 1  J . E .  Geisler, S.A. Bowhil l .  J. Atmosph. and T e r r .  Phys. ,  2 7 ,  457, 1965; 
2 7 ,  1 1 1 9 ,  1965. 
4 
R E F E R E N C E S  
( c o n t i n u e d  ) 
[ 8 ]  P.M. Banks. E l e c t r o n  Thermal C o n d u c t i v i t y  i n  t h e  Iono- 
s p h e r e  (Aeronomica A c t a  A N45-1966). 
Report t o  In te r -Union  Solar  Te r re s t r i a l  
Symposium, B e l g r a d e ,  1966,  t o  b e  p u b l .  
P l a n e t .  Space S c i .  
[ 9 ]  P.M. Banks. Thermal Conduction and I o n  Tempera tures  i n  
t h e  Ionosphere  (Aeronomica A c t a  A N49-1966). 
Report t o  In t e r -Un ion  Solar  Terrestr. Symp. 
Belgrade, 1 9 6 6 ,  t o  be p u b l .  P l a n e t .  Space S c i .  
T r a n s l a t e d  by  
ALB/ldf 
D r .  Andre L. B r i c h a n t  
on December 29, 1967. 


Estimates of the Upper Limit of Ion Temperature in the 7000-30,000 Km Altitude Range According to Measurements Aboard AES ''elektron-2''

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