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diff --git a/2219/CH5/EX5.1/Ex5_1.sce b/2219/CH5/EX5.1/Ex5_1.sce
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+//chapter 5 example 1 pg no-226

+//=============================================================================

+clc;

+clear;

+//Given Data

+F     =  100*10^9;//reflex klystron operating frequency

+n     =  3;//integer corresponding to mode

+

+//Calculations

+T_c   =  (n+(3/4))//transit time in cycles

+T     =  T_c/F//transit time in seconds

+

+//Output

+mprintf('Transit Time of the electron in the repeller space is %3.1f ps',T/10^-12);

+

+//=============================================================================

diff --git a/2219/CH5/EX5.2/Ex5_2.sce b/2219/CH5/EX5.2/Ex5_2.sce
new file mode 100755
index 000000000..f9ce4d5d8
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+//chapter 5 example 1 pg no-227

+//=============================================================================

+clc;

+clear;

+//Given Data

+F     =  2*10^9;//reflex klystron operating frequency

+Vr    =  2000;//Repeller voltage

+Va    =  500;//Accelarating voltage

+n     =  1;//integer corresponding to mode

+e     =  1.6*10^-19;//charge of electron

+m     =  9.1*10^-31;//mass of electron in kg

+s     =  2*10^-2;//space b/w exit of gap and repeller electrode

+dVr1  = 2;//(change in Vr in percentage

+//Calculations

+dVr   = dVr1*Vr/100;//conversion from percentage to decimal

+//dVr/df = ((2*pi*s)/((2*pi*n)-pi/2))*sqrt(8*m*Va/e));

+//let df = dVr/((2*pi*s)/((2*pi*n)-pi/2))*sqrt(8*m*Va/e));

+

+df       =  (dVr)/((2*%pi*s)/((2*%pi*n)-(%pi/2))*sqrt(8*m*Va/e));//change in freq as a fun of repeller voltage

+

+

+//Output

+mprintf('Change in frequency is %3.0f MHz',df/10^6);

+

+//=============================================================================

diff --git a/2219/CH5/EX5.3/Ex5_3.sce b/2219/CH5/EX5.3/Ex5_3.sce
new file mode 100755
index 000000000..258b03cd2
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+//chapter 5 example 3

+//=============================================================================

+clc;

+clear;

+//Given Data

+//let l   = dVr/Vr ; f  = df/f ; Vr/f  = R

+l     = 5;//percentage change in repeller voltage

+f     = 1;//percentage change in operating frequency

+R     = 1;//ratio of repeller voltage to operating frequency

+NR    = 1.5;//new ratio of repeller voltage to operating frequency in volts/MHz

+e     =  1.6*10^-19;//charge of electron

+m     =  9.1*10^-31;//mass of electron in kg

+

+//Calculations

+

+//dVr/df = ((2*pi*s)/((2*pi*n)-pi/2))*sqrt(8*m*Va/e));

+//((df/f)/(dVr/Vr)) = (Vr/f)*((2*pi*n)-pi/2)/(2*pi*s)*sqrt(e/(8*m*Va));

+//((df/f)/(dVr/Vr)) = K*(Vr/f);

+//where K = (((2*pi*n)-pi/2)/(2*pi*s))*sqrt(e/(8*m*Va))

+K    = (f/l)*(1/R)

+PCF  = NR*K*l//percentage change in frequency when new ratio (Vr/f)=1.5

+

+//Output

+mprintf('Percentage Change in frequency is %3.2f percent',PCF);

+

+//=============================================================================

diff --git a/2219/CH5/EX5.4/Ex5_4.sce b/2219/CH5/EX5.4/Ex5_4.sce
new file mode 100755
index 000000000..0b9476752
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+//chapter 5 example 4

+//=============================================================================

+clc;

+clear;

+//Given Data

+Va    = 40*10^3;//Anode voltage of cross field amplifier

+Ia    = 15;//Anode current in Amp

+Pin   = 40*10^3;//input power in watts

+G     = 10;//gain in dB

+n     = 40/100;//overall efficiency converted from percentage to decimal

+//Calculations

+//Gain  = (1+(Pgen/Pin))

+Pgen  = (G-1)*Pin//Generated power

+ne    = (Pgen/(Va*Ia))//electronic efficiency 

+nc    = n/(ne)//circuit efficiency 

+Pout  = Pin+(Pgen*nc)//output power

+//Output

+mprintf('Electronic Efficiency is %3.2f\n Output power is %g KW',ne,Pout/1000);

+

+//=============================================================================

diff --git a/2219/CH5/EX5.5/Ex5_5.sce b/2219/CH5/EX5.5/Ex5_5.sce
new file mode 100755
index 000000000..cf36099aa
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+//chapter 5 example 5 

+//=============================================================================

+clc;

+clear;

+//Given Data

+F     =  1*10^9;//two cavity klystron operating frequency

+Va    =  2500;//Accelarating voltage in volts

+e     =  1.6*10^-19;//charge of electron

+m     =  9.1*10^-31;//mass of electron in kg

+s     =  0.1*10^-2;//input cavity space

+//Calculations

+

+u     = sqrt((2*e*Va)/m);//velocity at which electron beam enters the gap

+T     = s/u ;//Time spent in the gap

+f     = T*F;//number of cycles

+

+//Output

+mprintf('Number of cycles that elase during transit of beam through input gap is %3.3f cycle',f);

+

+//=============================================================================

diff --git a/2219/CH5/EX5.6/Ex5_6.sce b/2219/CH5/EX5.6/Ex5_6.sce
new file mode 100755
index 000000000..ac9a0e5db
--- /dev/null
+++ b/2219/CH5/EX5.6/Ex5_6.sce
@@ -0,0 +1,22 @@
+//chapter 5 example 6

+//=============================================================================

+clc;

+clear;

+//Given Data

+N     = 8;//no. of resonators

+

+//Calculations

+mprintf('ϕ  = (2*π*n)/N \n');//phase difference

+mprintf(' ϕ   = (n*π)/4\n');//phase difference

+K   = N/2;//useful no. of nodes

+//Most dominant mode is the one for which phase differnce b/w adjacent resonators is π radians

+//Therefore (n*π)/4 = π

+n = 4

+

+

+//Output

+mprintf('Number of possible modes of Resonance is %d\n',N);

+mprintf('Number of useful modes of Resonance is %d\n',K);

+mprintf('value of integer n for the most dominant mode is %d',n);

+

+//=============================================================================

diff --git a/2219/CH5/EX5.7/Ex5_7.sce b/2219/CH5/EX5.7/Ex5_7.sce
new file mode 100755
index 000000000..5269ad41e
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+++ b/2219/CH5/EX5.7/Ex5_7.sce
@@ -0,0 +1,24 @@
+//chapter 5 example 7

+//=============================================================================

+clc;

+clear;

+//Given Data

+Va    =  1200;//Anode potential

+F     =  10*10^9;//Operating frequency in Hz 

+S     =  5*10^-2;//spacing b/w 2 cavities

+GS    = 1*10^-3;//gap spacing in either cavity

+e     =  1.6*10^-19;//charge of electron

+m     =  9.1*10^-31;//mass of electron in kg

+//Calculations

+//Condition of maximum output is (V1/Vo)max  =  (3.68)/((2*pi*n)-(pi/2);

+//(2*pi*n)-(pi/2) = Transit angle b/w two cavities

+//V1  = Peak amplitude of RF i/p

+//Vo  = accelarating potential

+

+Vo    = sqrt(2*e*Va/m);//velocity of the electrons 

+T     = S/Vo;//Transit time b/w the cavities

+TA    = 2*%pi*F*T;//transit angle in radians

+V1    = (3.68*Va)/TA;

+//Output

+mprintf('Required Peak Amplitude of i/p RF signal is %3.2f volts',V1);

+//=============================================================================

diff --git a/2219/CH5/EX5.8/Ex5_8.sce b/2219/CH5/EX5.8/Ex5_8.sce
new file mode 100755
index 000000000..1bcc67c67
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+++ b/2219/CH5/EX5.8/Ex5_8.sce
@@ -0,0 +1,18 @@
+//chapter 5 example 8

+//=============================================================================

+clc;

+clear;

+// Given Data

+R       = 10;           // circumference to pitch ratio

+e       = 1.6*10^-19;   // charge of electron

+m       = 9.1*10^-31;   // mass of electron in Kg

+c       = 3*10^8;       // vel. of EM waves in m/s

+

+// Calculations

+Vp      = c/R;           // axial phase velocity = free space vel*(pitch/circumference) 

+Va      = (Vp^2 * m)/(2*e);

+

+// Output

+mprintf('Anode Voltage = %3.2f kV',Va/1000);

+disp('In practice,the electron beam velocity is kept slightly greater than the axial phase velocity of RF signal')

+//------------------------------------------------------------------------------