Speaker
Dr
Sudiksha Khadka
(Stanford University)
Description
A cryogenic mechanical loss measurement setup built at Stanford University can operate from room temperature down to at least 12K. The experimental method described is based on actuation of a Si oscillator and measurement of its quality factor (Q-factor). The film’s mechanical loss can be obtained using the Q-factors of coated and uncoated resonators. Experimental results obtained for several Ti-doped GeO2 films deposited on a double paddle oscillator (DPO) with the resonant frequency of c.a. 6 kHz and temperature range 12 – 300 K are presented and discussed. Some preliminary results on micro resonators for frequency dependent measurements of the coatings in LIGO sensitive region (100 Hz – 300 Hz) are also presented.
Primary author
Dr
Sudiksha Khadka
(Stanford University)
Co-authors
Ashot Markosyan
(Stanford University)
Dr
Aykutlu Dana
(Stanford University)
Dr
Riccardo Bassiri
(Stanford University)
Prof.
Martin Fejer
(Stanofrd University)
Dr
Le Yang
(Colorado State University)
Prof.
Carmen Menoni
(Colorado State University)
Dr
Iain Martin
(University of Glasgow)
