Detection area enlargement of superconducting stripline detectors for time-of-flight mass spectrometry

✍ Scribed by K. Suzuki; S. Miki; S. Shiki; N. Zen; Z. Wang; M. Ohkubo

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 336 KB
• Volume: 469
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/j.physc.2009.05.042

✦ Synopsis

Superconducting stripline detectors (SSLDs) have promise as fast molecule detectors for time-of-flight mass spectrometry (TOF-MS). In this study, we have prepared NbN-SSLDs consisting of a meander structure with a thickness of 10 nm and a sensor size of 200 Â 200 lm 2 , which is larger than our previous sensor size of 50 Â 50 lm 2 and the largest ever reported as NbN-SSLDs. Mass spectra were successfully acquired for Angiotensin I and lysozyme by using a time-to-digital converter (TDC). It was confirmed that the counting rate and hence the statistics of mass spectra were considerably improved, while the rise time of output pulse was kept to less than 1 ns by adjusting the kinetic inductance of the striplines. With the high statistics, we have investigated the bias current dependence of detection efficiency.