Development of a Tunable Gas-Loaded Free-Electron Laser
{'Code': '07010000', 'Directorate': {'Abbreviation': 'ENG', 'LongName': 'Directorate For Engineering'}, 'Division': {'Abbreviation': 'ECCS', 'LongName': 'Div Of Electrical, Commun & Cyber Sys'}}
{'SignBlockName': 'Lawrence Goldberg', 'PO_EMAI': 'lgoldber@nsf.gov', 'PO_PHON': '7032928339'}
The objective of this research program is to investigate the                    performance of a free-electron laser for which a gaseous medium has             been introduced into the region of the wiggler, or undulating magnetic          field.  Placing a gas in an FEL wiggler alters the phase matching               condition.  This is a consequence of the fact that the gas introduces           an index of refraction which retards the phase velocity of the                  electromagnetic wave.  By changing the pressure of the gas, and so              changing the index of refraction, the oscillation wavelength can be             tuned, potentially from the infrared to the ultraviolet, without                altering either the energy of the electron beam or the wiggler                  parameters.  In addition to the tunability, the gas allows for a                significant reduction in beam energy, resulting in a lower cost and             size for the accelerator, and a higher gain per unit length for the             FEL.  As part of the program on FEL performance with a gas, there will          be an investigation of the effects of operating near an electronic              resonance in the gas.  In this case a high refractive index can be              obtained at relatively low gas densities.  There will also be a study           of the possibility of using interferometer mirrors with on-axis holes           to facilitate development of a compact in-line, high-gain system.  In           addition, the experiments will provide information concerning the               propagation of picosecond electron beams through gases at up to one             atmosphere pressure; investigate methods for increasing FEL gain with           high emittance beams; and study the optical properties of                       interferometers with on-axis holes.
{'FirstName': 'Richard', 'LastName': 'Pantell', 'PI_MID_INIT': 'H', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Richard H Pantell', 'EmailAddress': None, 'NSF_ID': '000179743', 'StartDate': '03/15/1989', 'EndDate': None, 'RoleCode': 'Principal Investigator'}
{'Name': 'Stanford University', 'CityName': 'STANFORD', 'ZipCode': '943052004', 'PhoneNumber': '6507232300', 'StreetAddress': '450 JANE STANFORD WAY', 'StreetAddress2': None, 'CountryName': 'United States', 'StateName': 'California', 'StateCode': 'CA', 'CONGRESSDISTRICT': '16', 'CONGRESS_DISTRICT_ORG': 'CA16', 'ORG_UEI_NUM': 'HJD6G4D6TJY5', 'ORG_LGL_BUS_NAME': 'THE LELAND STANFORD JUNIOR UNIVERSITY', 'ORG_PRNT_UEI_NUM': None}
{'Name': None, 'CityName': None, 'StateCode': None, 'ZipCode': None, 'StreetAddress': None, 'CountryCode': None, 'CountryName': None, 'StateName': None, 'CountryFlag': None, 'CONGRESSDISTRICT': None, 'CONGRESS_DISTRICT_PERF': '""'}
{'Code': '1517', 'Text': 'EPMD-ElectrnPhoton&MagnDevices'}
{'url': 'https://www.nsf.gov/awardsearch/download?DownloadFileName=1988&All=true', 'xml': '8819143.xml'}