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1 to 10 of 34 Results
Wide Field Infra-Red Survey Telescope (WFIRST) 2.4-meter mission study
Aug 25, 2013
Content, D.; Aaron, K.; Alplanalp, L.; Anderson, K.; Capps, R.; Chang, Z.; Dooley, J.; Egerman, R.; Goullioud, R.; Klein, D.; Kruk, J.; Kuan, G.; Melton, M.; Ruffa, J.; Underhill, M.; Buren, D. Van, 2013, "Wide Field Infra-Red Survey Telescope (WFIRST) 2.4-meter mission study", https://hdl.handle.net/2014/44342, SPIE Optics and Photonics, San Diego, California, August 25-29, 2013, JPL Open Repository
The most recent study of the Wide Field Infrared Survey Telescope (WFIRST) mission is based on reuse of an existing 2.4m telescope. This study was commissioned by NASA to examine the potential science return and cost effectiveness of WFIRST by using this significantly larger aper...
Wide Field Infrared Survey Telescope [WFIRST]: Telescope design and simulated performance
Jul 4, 2012
Goullioud, R.; Content, D. A.; Kuan, G. M.; Moore, J. D.; Chang, Z.; Sunada, E. T.; Villalvazo, J.; Hawk, J. P.; Armani, N. V.; Johnson, E. L.; Powell, C. A., 2012, "Wide Field Infrared Survey Telescope [WFIRST]: Telescope design and simulated performance", https://hdl.handle.net/2014/42742, SPIE Adaptive Optics Systems III Amsterdam, Netherlands, July 1-6, 2012, JPL Open Repository
No abstract provided
The Ultrasonic/Sonic Driller/Corer (USDC) as a subsurface drill, sampler and lab-on-a-drill for planetary exploration applications
Mar 1, 2005
Bar-Cohen, Yoaz; Chang, Z.; Sherrit, S.; Badescu, M.; Bao, X., 2005, "The Ultrasonic/Sonic Driller/Corer (USDC) as a subsurface drill, sampler and lab-on-a-drill for planetary exploration applications", https://hdl.handle.net/2014/37826, Industrial and Commercial Applications of Smart Structures Technologies Conference: Smart Structures and Materials Symposium, San Diego, CA, March 7-10, 2005, JPL Open Repository
In this paper, the latest status of the USDC development and applications that are undewary is reviewed and discussed.
Novel horn designs for power ultrasonics
Aug 24, 2004
Sherrit, Stewart; Badescu, M.; Bao, X.; Bar-Cohen, Y.; Chang, Z., 2004, "Novel horn designs for power ultrasonics", https://hdl.handle.net/2014/41503, IEEE Symposium on Ultrasounics, Montreal, Canada, August 24-27, 2004., JPL Open Repository
Ultrasonic horns are used in a variety of industrial and medical applications. At JPL a rock-sampling tool based on an ultrasonic horn was developed to drill, abrade and core rock samples including hard basalts. This device is an impact device, which uses ultrasonic vjbratlons th...
Design and analysis of ultrasonic horn for USDC (Ultrasonic/Sonic Driller/Corer)
Mar 15, 2004
Chang, Z.; Sherrit, S.; Bao, X.; Bar-Cohen, Y., 2004, "Design and analysis of ultrasonic horn for USDC (Ultrasonic/Sonic Driller/Corer)", https://hdl.handle.net/2014/7864, ["SPIE's Electroactive Polymer Actuators and Devices (EAPAD) Conference", 'San Diego, CA, USA'], JPL Open Repository
No abstract provided
Resonance analysis of high temperature piezoelectric materials for actuation and sensing
Mar 15, 2004
Sherrit, S.; Bao, X.; Bar-Cohen, Y.; Chang, Z., 2004, "Resonance analysis of high temperature piezoelectric materials for actuation and sensing", https://hdl.handle.net/2014/7872, ["SPIE's Smart Structures and Materials Conference", 'San Diego, CA, USA'], JPL Open Repository
No abstract provided
Characterization of bending EAP beams
Mar 15, 2004
Bao, X.; Bar-Cohen, Y.; Chang, Z.; Sherrit, S., 2004, "Characterization of bending EAP beams", https://hdl.handle.net/2014/7861, ["SPIE's Electroactive Polymer Actuators and Devices (EAPAD) Conference", 'San Diego, CA, USA'], JPL Open Repository
No abstract provided
Subsurface ice and brine sampling using an ultrasonic/sonic gopher for life detection and characterization in the McMurdo Dry Valleys
Mar 1, 2004
Bar-Cohen, Y.; Sherrit, S.; Chang, Z.; Wessel, L.; Bao, X.; Doran, P. T.; Fritsen, C. H.; Kenig, F.; McKay, C. P.; Murray, A.; Peterson, T., 2004, "Subsurface ice and brine sampling using an ultrasonic/sonic gopher for life detection and characterization in the McMurdo Dry Valleys", https://hdl.handle.net/2014/38140, SPIE Smart Structures Symposium, San Diego, CA, March 15, 2004, JPL Open Repository
There is growing evidence for ice and fluids near the surface of Mars with potential discharge of brines, which may preserve a record of past life on the planet. Proven techniques to sample Mars subsurface will be critical for future NASA astrobiology missions that will search fo...
Subsurface ice and brine sampling using an ultrasonic/sonic gopher for life detection and characterization in the McMurdo Dry Valleys
Dec 8, 2003
Bar-Cohen, Y.; Sherrit, S.; Chang, Z.; Wessel, L.; Bao, X.; Doran, P. T.; Fritsen, C. H.; Kenig, F.; McKay, C. P.; Murray, A., 2003, "Subsurface ice and brine sampling using an ultrasonic/sonic gopher for life detection and characterization in the McMurdo Dry Valleys", https://hdl.handle.net/2014/7848, ['Fall AGU Meeting', 'San Francisco, CA, USA'], JPL Open Repository
No abstract provided
Realtime sensing and monitoring while drilling using the USDC with integrated sensors
Sep 21, 2003
Bar-Cohen, Y.; Bao, X.; Chang, Z.; Sherrit, S., 2003, "Realtime sensing and monitoring while drilling using the USDC with integrated sensors", https://hdl.handle.net/2014/6974, ['2003 Eurosensors, 17th European Conference on Solid-State Transducers', 'Guimaraes, Portugal'], JPL Open Repository
No abstract provided
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