نتایج جستجو برای: gas laser

تعداد نتایج: 421702  

2015
Avram Klein Yan Zhou David Grimes

An apparatus that utilizes buffer gas cooling to produce slow atomic (Ba, Ca) and molecular (BaF, CaF) beams is constructed. In-cell temperatures of 20 0.25K are achieved with chamber cooldown times of under two hours. Laser Induced Fluorescence (LIF) spectra of BaF and CaF confirmed thermalization of the molecular beam to the temperature of the buffer gas and additional hydrodynamic cooling to...

Journal: :Optics letters 2008
F Pedaci Y Wang M Berrill B Luther E Granados J J Rocca

We report a dramatic improvement of the spatial coherence and beam divergence (0.66 mrad) of a 13.2 nm wavelength Ni-like Cd tabletop laser by injection seeding the soft x-ray laser amplifier with high-harmonics pulses generated in a Ne gas jet. This phase coherent laser is an attractive light source for at-wavelength interferometry of extreme ultraviolet lithography optics and other applications.

Journal: :Cytometry. Part A : the journal of the International Society for Analytical Cytology 2004
William G Telford Ella G Frolova

BACKGROUND Discrimination of stem cells with flow cytometric analysis of Hoechst 33342 efflux by the ABCG2 transporter (termed the Hoechst side population, or SP technique) is a valuable methodology for identifying bone marrow progenitors enriched with stem cells. Unfortunately, it requires a ultraviolet (UV) laser source, usually necessitating an expensive and maintenance-intensive argon- or k...

Amirmohammd Sattari Morteza Molaei, Pedram Hanafizadeh, Seyed Erfan Hosseini-Doost

Measuring the volume of a bubble, especially at its detachment, is a basic subject in gas-liquid two-phase flow research. A new indirect method for this measurement under constant flow conditions is presented. An electronic device is designed and constructed based on laser beam intensity. This device calculates the frequency of the bubble formation by measuring the total time of the formation p...

2010
Dan Haberberger Sergei Tochitsky Chao Gong Chan Joshi

The UCLA Neptune Laboratory CO2 laser system has been recently upgraded to produce 3ps multi-terawatt 10μm laser pulses. The laser energy is distributed over several 3ps pulses separated by 18ps. These temporally structured pulses are applied for laser driven ion acceleration in an H2 gas jet at a measured plasma density of 2x1019cm−3. Protons in excess of 20MeV have been observed in the forwar...

Journal: :Optics letters 2006
John C Painter Mark Adams Nicole Brimhall Eric Christensen Gavin Giraud Nathan Powers Matthew Turner Michael Ware Justin Peatross

We investigate the spatial evolution of a laser pulse used to generate high-order harmonics (orders ranging from 45 to 91) in a semi-infinite helium-filled gas cell. The 5 mJ, 30 fs laser pulses experience elongated focusing with two distinct waists when focused with f/125 optics in 80 Torr of helium. Extended phase matching for the generation of harmonics occurs in the region between the doubl...

1999
C. P. WANG

Intense laser emission has been observed from the KrF molecule formed by a chemical reaction initiated by fast-discharge circuitry. With a gas mixture of He:Kr:NF, = 500:50:1 and a sample pressure of 700 Torr, an output energy of 0. 8 mj was measured from a 25-nsec laser pulse (FWHM). Spectral analysis of the laser emission indicated laser action at 248.5 and 249.5 nm.

2002
J. Zweiback T. E. Cowan J. H. Hartley R. Howell K. B. Wharton J. K. Crane V. P. Yanovsky R. A. Smith

Recent experiments on the interaction of intense, ultrafast pulses with large van der Waals bonded clusters have shown that these clusters can explode with sufficient kinetic energy to drive nuclear fusion. Irradiating deuterium clusters with a 35 fs laser pulse, it is found that the fusion neutron yield is strongly dependent on such factors as cluster size, laser focal geometry, and deuterium ...

Journal: :Physical review letters 2011
S H Glenzer B J MacGowan N B Meezan P A Adams J B Alfonso E T Alger Z Alherz L F Alvarez S S Alvarez P V Amick K S Andersson S D Andrews G J Antonini P A Arnold D P Atkinson L Auyang S G Azevedo B N M Balaoing J A Baltz F Barbosa G W Bardsley D A Barker A I Barnes A Baron R G Beeler B V Beeman L R Belk J C Bell P M Bell R L Berger M A Bergonia L J Bernardez L V Berzins R C Bettenhausen L Bezerides S D Bhandarkar C L Bishop E J Bond D R Bopp J A Borgman J R Bower G A Bowers M W Bowers D T Boyle D K Bradley J L Bragg J Braucht D L Brinkerhoff D F Browning G K Brunton S C Burkhart S R Burns K E Burns B Burr L M Burrows R K Butlin N J Cahayag D A Callahan P S Cardinale R W Carey J W Carlson A D Casey C Castro J R Celeste A Y Chakicherla F W Chambers C Chan H Chandrasekaran C Chang R F Chapman K Charron Y Chen M J Christensen A J Churby T J Clancy B D Cline L C Clowdus D G Cocherell F E Coffield S J Cohen R L Costa J R Cox G M Curnow M J Dailey P M Danforth R Darbee P S Datte J A Davis G A Deis R D Demaret E L Dewald P Di Nicola J M Di Nicola L Divol S Dixit D B Dobson T Doppner J D Driscoll J Dugorepec J J Duncan P C Dupuy E G Dzenitis M J Eckart S L Edson G J Edwards M J Edwards O D Edwards P W Edwards J C Ellefson C H Ellerbee G V Erbert C M Estes W J Fabyan R N Fallejo M Fedorov B Felker J T Fink M D Finney L F Finnie M J Fischer J M Fisher B T Fishler J W Florio A Forsman C B Foxworthy R M Franks T Frazier G Frieder T Fung G N Gawinski C R Gibson E Giraldez S M Glenn B P Golick H Gonzales S A Gonzales M J Gonzalez K L Griffin J Grippen S M Gross P H Gschweng G Gururangan K Gu S W Haan S R Hahn B J Haid J E Hamblen B A Hammel A V Hamza D L Hardy D R Hart R G Hartley C A Haynam G M Heestand M R Hermann G L Hermes D S Hey R L Hibbard D G Hicks D E Hinkel D L Hipple J D Hitchcock D L Hodtwalker J P Holder J D Hollis G M Holtmeier S R Huber A W Huey D N Hulsey S L Hunter T R Huppler M S Hutton N Izumi J L Jackson M A Jackson K S Jancaitis D R Jedlovec B Johnson M C Johnson T Johnson M P Johnston O S Jones D H Kalantar J H Kamperschroer R L Kauffman G A Keating L M Kegelmeyer S L Kenitzer J R Kimbrough K King R K Kirkwood J L Klingmann K M Knittel T R Kohut K G Koka S W Kramer J E Krammen K G Krauter G W Krauter E K Krieger J J Kroll K N La Fortune L J Lagin V K Lakamsani O L Landen S W Lane A B Langdon S H Langer N Lao D W Larson D Latray G T Lau S Le Pape B L Lechleiter Y Lee T L Lee J Li J A Liebman J D Lindl S F Locke H K Loey R A London F J Lopez D M Lord R R Lowe-Webb J G Lown A P Ludwigsen N W Lum R R Lyons T Ma A J MacKinnon M D Magat D T Maloy T N Malsbury G Markham R M Marquez A A Marsh C D Marshall S R Marshall I L Maslennikov D G Mathisen G J Mauger M -Y Mauvais J A McBride T McCarville J B McCloud A McGrew B McHale A G MacPhee J F Meeker J S Merill E P Mertens P A Michel M G Miller T Mills J L Milovich R Miramontes R C Montesanti M M Montoya J Moody J D Moody K A Moreno J Morris K M Morriston J R Nelson M Neto J D Neumann E Ng Q M Ngo B L Olejniczak R E Olson N L Orsi M W Owens E H Padilla T M Pannell T G Parham R W Patterson G Pavel R R Prasad D Pendlton F A Penko B L Pepmeier D E Petersen T W Phillips D Pigg K W Piston K D Pletcher C L Powell H B Radousky B S Raimondi J E Ralph R L Rampke R K Reed W A Reid V V Rekow J L Reynolds J J Rhodes M J Richardson R J Rinnert B P Riordan A S Rivenes A T Rivera C J Roberts J A Robinson R B Robinson S R Robison O R Rodriguez S P Rogers M D Rosen G F Ross M Runkel A S Runtal R A Sacks S F Sailors J T Salmon J D Salmonson R L Saunders J R Schaffer T M Schindler M J Schmitt M B Schneider K S Segraves M J Shaw M E Sheldrick R T Shelton M K Shiflett S J Shiromizu M Shor L L Silva S A Silva K M Skulina D A Smauley B E Smith L K Smith A L Solomon S Sommer J G Soto N I Spafford D E Speck P T Springer M Stadermann F Stanley T G Stone E A Stout P L Stratton R J Strausser L J Suter W Sweet M F Swisher J D Tappero J B Tassano J S Taylor E A Tekle C Thai C A Thomas A Thomas A L Throop G L Tietbohl J M Tillman R P J Town S L Townsend K L Tribbey D Trummer J Truong J Vaher M Valadez P Van Arsdall A J Van Prooyen E O Vergel de Dios M D Vergino S P Vernon J L Vickers G T Villanueva M A Vitalich S A Vonhof F E Wade R J Wallace C T Warren A L Warrick J Watkins S Weaver P J Wegner M A Weingart J Wen K S White P K Whitman K Widmann C C Widmayer K Wilhelmsen E A Williams W H Williams L Willis E F Wilson B A Wilson M C Witte K Work P S Yang B K Young K P Youngblood R A Zacharias T Zaleski P G Zapata H Zhang J S Zielinski J L Kline G A Kyrala C Niemann J D Kilkenny A Nikroo B M Van Wonterghem L J Atherton E I Moses

We demonstrate the hohlraum radiation temperature and symmetry required for ignition-scale inertial confinement fusion capsule implosions. Cryogenic gas-filled hohlraums with 2.2 mm-diameter capsules are heated with unprecedented laser energies of 1.2 MJ delivered by 192 ultraviolet laser beams on the National Ignition Facility. Laser backscatter measurements show that these hohlraums absorb 87...

Journal: :Optics express 2015
W T Rawlins K L Galbally-Kinney S J Davis A R Hoskinson J A Hopwood M C Heaven

The optically pumped rare-gas metastable laser is a chemically inert analogue to three-state optically pumped alkali laser systems. The concept requires efficient generation of electronically excited metastable atoms in a continuous-wave (CW) electric discharge in flowing gas mixtures near atmospheric pressure. We have observed CW optical gain and laser oscillation at 912.3 nm using a linear mi...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید