Thesis Chapters by Muhammad KalimUllah
Geiger-Müller (GM) tube based radiation detectors require high voltage DC biasing for
their opera... more Geiger-Müller (GM) tube based radiation detectors require high voltage DC biasing for
their operation. The objective of this project is to design and implement a variable DC
power supply of 3kV/10mA with short-circuit protection for GM detectors. The proposed
design is based on rectification of AC 220V followed by a buck converter to generate a
variable DC supply of 300V. A square wave of variable amplitude is generated from the
variable DC supply through semiconductor switches. The square wave is fed to a 16-
stage Cockcroft Walton’s multiplier to generate variable DC supply of 3kV with a
resolution of 10V and ripple of less than 2mV at rated current of 10mA. The variable
output voltage is controlled and regulated by employing feedback control using
microcontroller and voltage sensors.
This dissertation sums up the work done on this project. It includes requirements
analysis, comparative study of different approaches followed by selection of Cockcroft
Walton’s multiplier as the most appropriate design. For the selected design, a parametric
study is presented based on simulation results followed by hardware implementation. It
also includes the development of a feedback control system to control and regulate the
high voltage DC output. The thesis includes the testing and evaluation of the
implemented design and formulates suggestions for further research and development on
detector bias supplies.
Uploads
Thesis Chapters by Muhammad KalimUllah
their operation. The objective of this project is to design and implement a variable DC
power supply of 3kV/10mA with short-circuit protection for GM detectors. The proposed
design is based on rectification of AC 220V followed by a buck converter to generate a
variable DC supply of 300V. A square wave of variable amplitude is generated from the
variable DC supply through semiconductor switches. The square wave is fed to a 16-
stage Cockcroft Walton’s multiplier to generate variable DC supply of 3kV with a
resolution of 10V and ripple of less than 2mV at rated current of 10mA. The variable
output voltage is controlled and regulated by employing feedback control using
microcontroller and voltage sensors.
This dissertation sums up the work done on this project. It includes requirements
analysis, comparative study of different approaches followed by selection of Cockcroft
Walton’s multiplier as the most appropriate design. For the selected design, a parametric
study is presented based on simulation results followed by hardware implementation. It
also includes the development of a feedback control system to control and regulate the
high voltage DC output. The thesis includes the testing and evaluation of the
implemented design and formulates suggestions for further research and development on
detector bias supplies.
their operation. The objective of this project is to design and implement a variable DC
power supply of 3kV/10mA with short-circuit protection for GM detectors. The proposed
design is based on rectification of AC 220V followed by a buck converter to generate a
variable DC supply of 300V. A square wave of variable amplitude is generated from the
variable DC supply through semiconductor switches. The square wave is fed to a 16-
stage Cockcroft Walton’s multiplier to generate variable DC supply of 3kV with a
resolution of 10V and ripple of less than 2mV at rated current of 10mA. The variable
output voltage is controlled and regulated by employing feedback control using
microcontroller and voltage sensors.
This dissertation sums up the work done on this project. It includes requirements
analysis, comparative study of different approaches followed by selection of Cockcroft
Walton’s multiplier as the most appropriate design. For the selected design, a parametric
study is presented based on simulation results followed by hardware implementation. It
also includes the development of a feedback control system to control and regulate the
high voltage DC output. The thesis includes the testing and evaluation of the
implemented design and formulates suggestions for further research and development on
detector bias supplies.