Pulsed Magnet Power Supplies for Indus-1
The specifications of pulse
power supplies required for booster (injection and extraction) and the
Indus-1 SRS (injection) are listed in following table
|
Parameters |
Booster Injection
Kicker |
Booster Injection
Septum |
Booster Extraction
Kicker |
Booster Extraction
Septum |
Indus-1 SRS Injection
Kicker |
|
Peak current (A) |
1000 |
5000 |
1200
(2400) |
5000 |
2500
(5000) |
|
Pulse width (μs) |
13
(Half sine) |
200
(Half sine) |
0.1
(Trapezoidal) |
200
(Half sine) |
1.2 (Rise)
0.1 (Fall τ) |
|
Jitter
(ns) |
- |
- |
< 5 |
- |
< 5 |
|
Load Inductance (μH) |
0.46 |
1.02 |
0.6
(Two coils) |
1.76 |
0.6
(Two coils) |
The pulsed magnet power supplies have been developed using different
schemes. Brief description is as follows:
Pulse
Shape - Half Sinusoidal [ Go to Top ]
The booster injection kicker, booster injection septum and booster
extraction septum magnets are energized by a pulse current of half
sinusoidal shape. The pulse width varies in the range 3 micro seconds to 200 micro seconds and the
peak current varied from 700 A to 5 kA for different magnets. These pulses
are generated by discharging a bank of energy storage capacitors into the
inductive load of septum magnet via a thyristor switch to form an under
damped LCR circuit.
 |
|
 |
| Power
supply for booster injection septum |
|
Power supply for booster extraction septum |
Pulse
Shape - Trapezoidal [ Go to Top ]
The booster extraction kicker magnet is energized by a pulse current of
trapezoidal shape. The rise time is 45-50 ns and the flat-top time is
typically 60-70 ns.
 |
|
 |
|
Power supply for booster extraction
kicker |
|
A view of thyratron assembly |
Pulse
Shape – Damped Sinusoidal Rise and Exponential Fall [ Go to Top ]
The Indus-1 SRS injection kicker magnet is energized by a pulse current
characterized by damped sinusoidal rise and exponential fall. The rise time
is 1.2 micro seconds and fall decay time constant is 120 ns
 |
|
Power
supply for Indus-1 SRS injection kicker |
|
