Work as an experimental physicist

Jul 15, 2015 research PCB LN2 phys-332

PCB in liquid nitrogen

In order to test some PMTs at liquid nitrogen temperature (77 Kelvin), my students are designing some Printed Circuit Board (PCB) to apply high voltage to the PMTs. However, whether PCBs work at that low temperature is a question. To find it out, they dumped an old PCB to liquid nitrogen several times and checked all pins, lines and soldering points and did not find anything wrong. Indeed, this board works at 77 Kelvin!


Blogs on physics research and educational activities of Jing LIU, an assistant professor in physics at the University of South Dakota. He is an experimental physicist developing novel particle detectors for astroparticle physics and civil use.