1 mm ultrafast superconducting stripline molecule detector

Zen, N.; Casaburi, A.; Shiki, S.; Suzuki, K.; Ejrnaes, M.; Cristiano, R.; Ohkubo, M.
October 2009
Applied Physics Letters;10/26/2009, Vol. 95 Issue 17, p172508
Academic Journal
Superconducting stripline detectors (SSLDs) are promising for detecting keV molecules at nanosecond response times and with mass-independent detection efficiency. However, a fast response time is incompatible with practical centimeter detector size. A parallel configuration of striplines provides a means to address this problem. Experimental results and simulation for promisingly large 1-mm-square parallel niobium SSLDs show that nanosecond pulses are produced by superconducting-normal transition within only one of the parallel striplines instead of cascade switching of all the parallel striplines. Successful detection of a series of multimers of immunoglobulin G up to 584 kDa supports the mass-independent efficiency for mass spectrometry.


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