114
_
'
5.
THERMIONIC EMISSION
which case the exponent of equation 5—10 varies, usually from 1.1
,
to 1.3, 'for different tubes.
Whatever its value, provided it remain
constant, the logarithmic test(gure 5—6) of Richardson’s equation should yield a straight line. To insure saturation, let E,, =
200 or more
volts and vary the lament voltage from, say 2 to not
j L“
_
more than 3.7 volts. A convenient plate current meter reads 0—5 or
W‘
0—10_milliamperes.
.
.
_
REFERENCES
1. W. Schottky, Ann. d. Physik., 57, 541 (1918).
_ÇÏC
2. T. C. Fry, ]r. Frank. Inst., 199, 216 (1925). A rigorous derivation.
3. R. Fürth, Phys. Zeit, 23, 354 (1922). A simplied derivation.
4. A. W. Hull and N. H. Williams, Phys. Rev., 25, 147 (1925).
5. G. S. Pearson,
Tech. ]r., 13, 634 (1934), or Physics, 5,
,
233
Amplier Noises.
6. ]. B. Johnson, Phys. Rev., 32, 97 (1928), and referen'ce 5.
7. A. Sommerfeld, Naturwiss., 21, 374 (1928).
.
8. S. Dushman, Rev. Mod. Phys., 2, 381 (1930).
'
9. K. K. Darrow, Rev. Mod. Phys., 1, 90 (1929).
10. L. R. Koller, T/ze Physics of Electron Tubes.
McGraw-Hill Book Co.
‘
,
(1934).
Also Reference 8.
,
11. H. A. Jones and I. Langmuir, Gen. Elec. Rev., 30, 310, 354, 408 (1927).— »
12. W. Shottky, Zeits. f. Physik, 14, 63 (1923).
.
1,3- W°rthîng- and” Forsrthe> Phys. Rev.. 18. 145 (1921).
GENERAL REFERENCE
'
A-—E L- Cha"ee, Theory of Thermianic Vacuum Tubes,
Hill Book Co. (1933).
'
,
[ :
_
'
5.
THERMIONIC EMISSION
which case the exponent of equation 5—10 varies, usually from 1.1
,
to 1.3, 'for different tubes.
Whatever its value, provided it remain
constant, the logarithmic test(gure 5—6) of Richardson’s equation should yield a straight line. To insure saturation, let E,, =
200 or more
volts and vary the lament voltage from, say 2 to not
j L“
_
more than 3.7 volts. A convenient plate current meter reads 0—5 or
W‘
0—10_milliamperes.
.
.
_
REFERENCES
1. W. Schottky, Ann. d. Physik., 57, 541 (1918).
_ÇÏC
2. T. C. Fry, ]r. Frank. Inst., 199, 216 (1925). A rigorous derivation.
3. R. Fürth, Phys. Zeit, 23, 354 (1922). A simplied derivation.
4. A. W. Hull and N. H. Williams, Phys. Rev., 25, 147 (1925).
5. G. S. Pearson,
Tech. ]r., 13, 634 (1934), or Physics, 5,
,
233
Amplier Noises.
6. ]. B. Johnson, Phys. Rev., 32, 97 (1928), and referen'ce 5.
7. A. Sommerfeld, Naturwiss., 21, 374 (1928).
.
8. S. Dushman, Rev. Mod. Phys., 2, 381 (1930).
'
9. K. K. Darrow, Rev. Mod. Phys., 1, 90 (1929).
10. L. R. Koller, T/ze Physics of Electron Tubes.
McGraw-Hill Book Co.
‘
,
(1934).
Also Reference 8.
,
11. H. A. Jones and I. Langmuir, Gen. Elec. Rev., 30, 310, 354, 408 (1927).— »
12. W. Shottky, Zeits. f. Physik, 14, 63 (1923).
.
1,3- W°rthîng- and” Forsrthe> Phys. Rev.. 18. 145 (1921).
GENERAL REFERENCE
'
A-—E L- Cha"ee, Theory of Thermianic Vacuum Tubes,
Hill Book Co. (1933).
'
,
[ :