Towards a dc SQUID read-out for the normal metal hot-electron microbolometer
2002
Aprototype of SQUID read-out for current measurements at the output of a normal metal hot-electron microbolometer has been developed and tested. The system is based on serial VTT dc SQUID and input l-metal core solenoid transformer. The achieved current resolution is 300 fA/Hz 1=2 . Johnson noise of metal resistor and shot noise of tunnel junction were used for current calibration of SQUID read-out. The current noise spectra of 35 kX SIN tunnel junction measured at different bias voltages are presented. 2001 Elsevier Science B.V. All rights reserved.
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