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Topic: Spectrometer


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In the News (Wed 26 Jun 19)

  
  Spectrometer Services
Spectrometer Services Pty Ltd is a test laboratory providing expert, reliable and independent analytical services to all sectors of industry, commerce and government throughout Australia.
Spectrometer Services is equipped with state-of-the-art equipment including spark emission, ICP-AES, atomic absorption and gas analysers.
Spectrometer Services has been operating since 1961 and is recognised as a leader in this field.
www.spectrometer.com.au   (133 words)

  
 Spectrometers
User-configured spectrometers are for those who wish to select components and options in their spectrometer, from the wavelength range and grating type to the size of the entrance aperture and type of coatings on the detector.
Systems and setups are either turnkey spectrometers or complete setups necessary for a specific measurement technique, such as fluorescence, or a specific application, such as measuring LEDs.
CONTACT US © 2007 Ocean Optics, Inc. All rights reserved.
www.oceanoptics.com /products/spectrometers.asp   (81 words)

  
 Mass spectrometer
The sector field mass spectrometers (SFMS) used for helium isotope and tritium measurement are commercial instruments (Fig.
During automated operation, the mass spectrometers are pumped between measurements of individual samples or standards by ion getter pumps (Varian, StarCell VacIon Plus 40) attached to the flight tubes by pneumatically operated valves (VG, CR 38 TU, and VAT, Series 57, respectively).
The sensitivity of the mass spectrometers is mainly a function of the source parameters: repeller, electron energy, focus, beam center and source magnet position.
www.ldeo.columbia.edu /~etg/ms_ms/Mass_spectrometer.html   (879 words)

  
  Spectrometer
A similar instrument with half the lags was built for the Tucson 12-meter telescope and is in use as the primary spectrometer.
In experiments where a pulsar of known period is observed, the spectrometer will maintain separate integration results for 256 lags in up to 4096 time bins across the pulsar period.
RAM memory is included in the spectrometer design to deliver 1.3 msec bursts of contiguous 2-bit samples, originally taken at the 1.6 GHz sample rate, to an array of 16 correlator chips being clocked at 100 MHz.
www.nrao.edu /engineering/spectrometer.shtml   (323 words)

  
 Spectrum of Betelgeuse Captured with a Prototype SBIG Spectrometer
The spectrometer and ST-7/8 are coupled and mounted as a unit onto the telescope (See Figure 1).
The system is quite handy for collecting spectra since both the object of interest and the spectrometer entrance slit are simultaneously imaged onto the tracking CCD, allowing the object to be viewed and accurately placed onto the slit.
Description: The spectrometer is designed to operate with the ST-7/8.
www.sbig.com /sbwhtmls/spectrometer2.htm   (894 words)

  
 Untitled Document
With its capacity to see light that's redder than the red we see, the Composite Infrared Spectrometer (CIRS) searches for heat and is capable of discerning an object's composition.
CIRS is a spectrometer, which means that it splits light into different colors, like a glass prism, or a raindrop creating a rainbow.
CIRS is special because it is sensitive to invisible heat rays, or infrared light, rather than ordinary visible light.
saturn.jpl.nasa.gov /spacecraft/instruments-cassini-cirs.cfm   (553 words)

  
 the mass spectrometer - how it works
If something is moving and you subject it to a sideways force, instead of moving in a straight line, it will move in a curve - deflected out of its original path by the sideways force.
Most of the ions passing through the mass spectrometer will have a charge of 1+, so that the mass/charge ratio will be the same as the mass of the ion.
When an ion hits the metal box, its charge is neutralised by an electron jumping from the metal on to the ion (right hand diagram).
www.chemguide.co.uk /analysis/masspec/howitworks.html   (1467 words)

  
  PlasmQuad 3, ICP MS, Inductivity Coupled Plasma Mass Spectromete
VG PlasmaQuad 3 is a third generation Inductivity Coupled Plasma Mass Spectrometer and the latest in family of ICP-MS instruments, which encompass the entry-level genesis and the multicollector P54.
The interface operates at a low pressure, usually maintained by a mechanical rotary pump, and is water-cooled to prevent the high temperature source damaging components.
The instrument itself communicates to the software through the ICP Spectrometer Control Service, which is accessed through the icon on the start bar.
www.gclctoronto.com /plasmaquad3.htm   (1438 words)

  
 Spectrometer Summary
Equipped with sophisticated scanning equipment and flown in an airplane, spectrometers are used to produce geological maps, to detect pollutants in shallow water, or to monitor crops and forest for damage.
Spectrometer is a term that is applied to instruments that operate over a very wide range of wavelengths, from gamma rays and X-rays into the far infrared.
Spectrometers known as spectroscopes are used in spectroscopic analysis to identify materials.
www.bookrags.com /Spectrometer   (3644 words)

  
 Neutron Spectrometer
The neutron spectrometer is the second spectrometer that is used on the Odyssey mission.
It is located in the body of the spacecraft as opposed the gamma ray spectrometer which is located at the end of the 6 meter boom.
In the spectrometer, the neutrons enter and begin to lose energy because they are colliding with nuclei inside the prisms.
www.sas.upenn.edu /~murrayt/spec6.html   (254 words)

  
 Pseudoslit Spectrometer
The pseudoslit spectrometer is so named because it would not include a slit, but the combined effects of its optical components would include a spatial filtering effect approximately equivalent to that of a slit.
However, the pseudoslit spectrometer would be more efficient because unlike a prior LVE spectrometer, the pseudoslit spectrometer would not have to be scanned across an entire field of view to obtain the spectrum of an object of interest that may occupy only a small portion of the field of view.
However, the pseudoslit spectrometer would be optically and mechanically simpler: it would have fewer components and, hence, would pose less of a problem of alignment of components and would be less vulnerable to misalignment.
www.nasatech.com /Briefs/Apr04/GSC13806.html   (482 words)

  
 Section 3; Spectrometer Throughput and Etendue - The Optics of Spectroscopy
Therefore, the light from the fiber is collected by a lens with a 150 mm object distance, p, and projects an image of the fiber core on the spectrometer entrance slit 300 mm, q, from the lens.
The f/values are matched to both the light propagating from the fiber and to that of the spectrometer.
Assuming the same spectrometer and bandpass requirements as in the fiber optic source example (3-4) the slit widths and etendue of the spectrometer will also be the same as will the spectrometer etendue.
www.jobinyvon.com /usadivisions/OOS/oos3.htm   (1723 words)

  
 Spectrometers
A present-day user of a spectrometer employs a diffraction grating; if the grating spacing of the grating is known with precision the wavelengths may be obtained directly from the angle at which the particular lines appear.
The spectrometer on the left was built by John A. Brashear of Allegeny, Pennsylvania, for the Smith Observatory at Hobart College.
The device at the bottom was used to attach the spectrometer to the telescope: the ring clamped around the telescope tube and the tubes above and below the collimator arm on the right-hand side slipped into the two rods on the connector.
physics.kenyon.edu /EarlyApparatus/Optics/Spectrometers/Spectrometers.html   (1704 words)

  
 The Alta Reflectance Spectrometer
The spectrometer uses light in visible colors (blue through red in seven wavelengths) and in four invisible "colors" of infrared light.
The spectrometer and activities are designed for grades 8 through college, and they have been used with middle school gifted and talented classes.
General Description: The ALTA Reflectance Spectrometer® is a classroom instrument designed to allow students (grade 5 through adult) to learn about visible light, invisible light, the origins of color, and the value of reflection spectroscopy of light in remote sensing applications.
www.lpi.usra.edu /education/products/spectrometer   (1038 words)

  
 Mass Spectrometer
A UTI Model 100C quadrupole mass spectrometer, capable of detecting molecules with mass to charge ratios from 1 to 300, is used to collect TPRS and ESD data.
The spectrometer is enclosed by a shield with a 1/8" diameter aperture, to optimize detection of the molecules desorbing directly from the center of the crystal.
The mass spectrometer signal of the gaseous desorption products is monitored as a function of both time and temperature using the TPRS98 program interfaced to the mass spectrometer and thermocouple.
www.wellesley.edu /Chemistry/Chris/mass_spec.html   (172 words)

  
 The UV/Vis Spectrometer
The UV/Vis spectrometer consists of a light source, a sample compartment, a diode-array detector, and a data acquisition computer.
The spectrometer measures the amount of ultraviolet and visible light transmitted by a sample placed in the sample compartment.
Don't stop the spectrometer; you can't stop the reaction, and you may be able to salvage enough data to avoid starting over.
www.ent.ohiou.edu /che/che415/UV_w02.html   (1516 words)

  
 Questar Solar Spectrometer   (Site not responding. Last check: )
The Questar Maximum-Resolution Solar Spectrometer blocks ultraviolet and infrared radiation while allowing the sun’s visible light, the visible solar spectrum, to be viewed in true and gorgeous color.
Questar`s Maximum-Resolution Solar Spectrometer is able to sample visible light from every region of the sun's disk, including the surrounding chromosphere, the sun's complex, transitional atmosphere, from which the helium emission arises.
To accomplish this feat, the Questar Maximum-Resolution Solar Spectrometer resolves wavelengths of light spaced apart by as little as 0.17 Angstrom units, or 17 trillionths of a meter, and faintly absorbed by excited, iron atoms from the visible, solar spectrum.
www.questarcorporation.com /spectro1.htm   (350 words)

  
 Neutron Spectrometer   (Site not responding. Last check: )
Further extensive analysis of the NSís reams of data -- with the help of newly constructed computer algorithms -- have allowed scientists to advance the accuracy of their estimates of the amount of water buried in the lunar polar regions.
Lunar Prospector scientists are still determining exactly how many craters at the North and South poles contain the millions of tons of water ice measured by the neutron spectrometer.
The most informative data is expected to be gleaned in just under a year, when the spacecraft begins its extended mission and dips down into a very low orbit of approximately six miles (10 kilometers) above the lunar surface.
lunar.arc.nasa.gov /NewResults/neutron_spectrometer.html   (431 words)

  
 Mass Spectrometer - Search Results - MSN Encarta
Mass Spectrometer, apparatus that converts molecules into ions and then separates the ions according to their mass-to-charge ratio.
Scientists can use a device called a mass spectrometer to measure atomic mass.
A mass spectrometer removes one or more electrons from an atom.
encarta.msn.com /Mass_Spectrometer.html   (140 words)

  
 [No title]   (Site not responding. Last check: )
The HyperCP spectrometer is the highest-rate particle physics detector in the world, with an ability to record 80,000 events per spill second to tape, or about 15 MB/s.
The spectrometer analyzing magnet has sufficient strength to ensure that the proton and pions from the Xi -> Lambda + piminus, Lambda -> proton + piminus, and K -> 3pi decays are always well separated from each other as well as from the charged beam exiting the collimator.
This allows a simple, yet selective trigger to be formed by requiring the coincidence in hodoscopes at the rear of the spectrometer of charged particles on either side of the spectrometer.
ppd.fnal.gov /experiments/e871/public/spectrometer.html   (404 words)

  
 Spectrometer Acceptance
The particles are then run forward through the model of the spectrometer, and focal plane tracks are recorded for all particles which make it all of the way through the detector stack.
Cuts were applied at the entrance and exit of each magnet, at a point 2/3 of the way through Q1 and Q2, and at the beamline apertures between the dipole exit and the entrance to the detector hut.
Because the vacuum pipe was not precisely surveyed in the spectrometer, it was shifted down 2.0 cm in the model in order to match the cuts seen in the data.
www.krl.caltech.edu /~johna/thesis/node64.html   (1586 words)

  
 X-ray/Gamma-Ray Spectrometer
The x-ray spectrometer measures x-ray florescence on the asteroid excited by solar flare x-rays using three gas-filled proportional counters: one bare, one with a Mg filter and one with an Al filter.
The gamma-ray spectrometer is a NaI scintillator with an active BGO shield.
A unique feature of both the x-ray and gamma-ray spectrometers is the high accuracy high voltage control electronics that maintains about 0.5 V stability of the high voltage (1500 V) power supplies over the full temperature range.
near.jhuapl.edu /instruments/XGRS/index.html   (386 words)

  
 Berkeley Spectrometer   (Site not responding. Last check: )
The Berkeley spectrometer occupies the inner 50% of the aperture diameter and obscures the inner 25% of the primary mirror area.
The smallest segment, representing a 36 degree wedge of the annulus, is intercepted by an off-axis ellipsoidal optic near Z=+60cm which images the target and aperture onto a sealed tube microchannel plate detector sensitive to wavelengths near 1500 Angstroms.
The telescope tube is fabricated of carbon-fiber composite, and is therefore prone to shrinkage as water vapor is outgassed on orbit.
www.cea.berkeley.edu /albert/orfeus/orfeus-revised.html   (5193 words)

  
 GBT Spectrometer Home Page   (Site not responding. Last check: )
The GBT autocorrelation spectrometer is capable of producing 32 simultaneous auto-correlations, with 50 MHz bandwidth or 8 simultaneous auto-correlations with 800 MHz bandwidth.
The specifications for the GBT Spectrometer were outlined by Jay Lockman in 1992 in GBT Memo 83.
The specification of the GBT spectrometer is given in memo 83.
www.gb.nrao.edu /GBT/MC/gbt/devices/backends/spectrometer/docs   (710 words)

  
 Mass Spectrometer
A velocity selector is used with mass spectrometers to select only charged particles with a specific velocity for analysis.
Mass spectrometers are sensitive detectors of isotopes based on their masses.
For example, the SOHO satellite uses a mass spectrometer to analyze the solar wind.
hyperphysics.phy-astr.gsu.edu /hbase/magnetic/maspec.html   (298 words)

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