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Topic: Cold trap

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	Cold Trap Entrance , Alaska Science Forum (Site not responding. Last check: 2007-11-05)
		However, climbing is good for the legs and the cold trap entrance avoids the drafts and heat loss of a conventional doorway.
		The cold trap entrance operates on the principal that cold air is heaviest and therefore settles downward.
		The use of a solid door in a cold trap entrance is optional.
	www.gi.alaska.edu /ScienceForum/ASF0/067.html (186 words)

	Cold Traps
		Cold traps are used in instrumentation and elsewhere to prevent the introduction of vapors or liquids into a measuring instrument from a system, or from a measuring instrument (such as a McLeod gauge) into the system.
		For example, many of the slush mixtures used in cold traps are toxic or explosive hazards, and this is not indicated in the literature.
		If the cold trap mixture is allowed to freeze, and the cold trap becomes rigid, slight movement in other parts of the apparatus could result in breakage of the trap or other glassware.
	www.chemistry.ohio-state.edu /ehs/handbook/gases/coldtrap.htm (1567 words)

	Antimatter factory - Antihydrogen TRAP Collaboration - ATRAP
		TRAP observes the radio signal from a single antiproton isolated by itself in a trap.
		Antiprotons enter the trap apparatus from below, and are captured in the lower section of the trap (below the place where the diameter of the support structure becomes larger.) When captured they oscillate within this lower structure, until collisions with cold electrons stored within lower their energy dramatically.
		When cold antiprotons and cold positrons have both been accumulated, then a mechanical valve that separates the lower and upper regions of the trap will be opened, and the ingredients of cold antihydrogen will be allowed to interact.
	public.web.cern.ch /Chronological/Announcements/CERNAnnouncements/2000/0808-ADStartUp/Atrap/atrap-en.html (1326 words)

	Metra Inc. Dry Ice Cold Trap Systems (Site not responding. Last check: 2007-11-05)
		The ATN6000-BPM system is a stand-alone, electro-polished, stainless steel vacuum cold trap with a quick remove dewar and bypass manifold with valves that allow isolation of the cold trap for cleaning without interrupting the vacuum to the transformer.
		The cold trap holds 6 liters of dry ice slurry and has a 3” stainless steel manifold supported by a heavy gauge enameled steel frame and stand with lifting bars.
		During cold trap servicing the bypass butterfly valve can be opened to allow continuous vacuum pumping by the rough pump to the transformer.
	www.metrainc.com /cold_traps_sys.htm (202 words)

	[No title]
		Upon entering such a cold trap, driving will commence using the waypoint control as before, however lights or strobes will be used as necessary to augment the illumination provide by Earthshine.
		However, by the very nature of cold traps the horizon will be higher than normal (to block out the Sun), it is expected that Earthshadows will be more common than while in the light.
		Cold Trap darkness is simply a form of shadow, which by searching the angles to the horizon (with the panospheric camera) can be determined to be permanent.
	www.cs.cmu.edu /afs/cs.cmu.edu/project/lri/MRD-97/doc/TechReport/operations.chapter.fm.txt (1777 words)

	Cold Trap CT9000. (Site not responding. Last check: 2007-11-05)
		The Cold Trap 9000 uses a vacuum pump based on a multi stage ejector using a carrier fluid like pressurized air which allows a simple and precise adjustment of the refrigeration fluid.
		The heating of the Cold Trap 9000 is performed by giving a direct current to a small tube which allows the system to be heated up from -150°C up to 300°C in less then 20 seconds, which results in a heating rate of >1’350°C / minute.
		The speed in cooling down the Cold Trap 9000 is therefore related to the GC Oven Temperature.
	www.brechbuehler.ch /usa/CT.html (583 words)

	Inlet system (Site not responding. Last check: 2007-11-05)
		All traps are housed in a protection vacuum maintained by a rotary pump for proper thermal insulation and to avoid water vapour condensation on the cold surfaces.
		Two silicon diodes and heaters are stabilizing the temperatures at 253 K at the trap inlet and 123 K at the trap outlet to distribute the freeze-out of the water over the entire length of the trap.
		The adsorption coefficient of gases on the activated charcoal is a function of the partial pressure in the cold trap, the volume of the trap, the amount and type of activated charcoal, and the temperature of the trap.
	www.ldeo.columbia.edu /~etg/ms_ms/Inlet_system.html (1670 words)

	Metra Inc. Dry Ice Cold Traps (Site not responding. Last check: 2007-11-05)
		Dry-ice and alcohol is all that is needed to cool this cold trap to -75 ° C., thus trapping most volatile materials.
		The ATN cold traps shown above serve as a vapor traps and cryopump interfaces between the vacuum pump and the system.
		The CT400 is a vacuum line cold trap for the quick removal of condensables in a vacuum manifold.
	www.metrainc.com /cold_traps.htm (277 words)

	Long Life Anti-Migration Cryogenic Cold Trap
		The Cooke long life traps are designed for vacuum applications where it is desirable to reduce oil and or water vapor contamination of the environment.
		The long life traps prevent diffusion pump oil from entering the vacuum system with little effect on the conductance or the pump down time.
		Although the long life cold trap series may be used directly above the diffusion pumps, it is preferable to use either a water-cooled or ambient baffle between the long life cold trap and the pump.
	www.cookevacuum.com /llamcct.html (266 words)

	Laser Cooling and Trapping Home Page
		We propose and demonstrate a scheme for a blue-detuned optical dipole trap for cold atoms which consists of a single, rapidly rotating laser beam.
		A~4 times adiabatic increase in the peak phase-space density of the trapped atoms is obtained due to the change in the shape of the trap potential.
		The two-body elastic and inelastic collision rates of atoms in the compressed trap are determined.
	www.weizmann.ac.il /home/davidson/abstract_robot.html (151 words)

	Section 2-5-2-4
		If a trap requires regeneration, or in the unlikely event of a fault (as indicated by the impurity monitoring systems), the alternate trap will be valved in.
		Cold and hot traps (gettering materials are shown in cross hatched areas; all dimensions in mm).
		Another hot trap with titanium getter material is to remove nitrogen that comes from the atmosphere during repair or exchange of the components and from the adhesion on the inner surface of the lithium components.
	www.frascati.enea.it /cda/FinalReport/sec2_5-2-4.html (1066 words)

	The Trap and Cold Bath (Site not responding. Last check: 2007-11-05)
		The function of the trap is to protect the pump oil from contamination.
		To achieve this, the trap is immersed in a cold bath which is capable of freezing out contaminants.
		The low temperature of the cold bath lowers the vapor pressure of the contaminants so they will not move from the trap under the low pressure conditions.
	www.umd.umich.edu /casl/natsci/slc/slconline/VAC/sld013.htm (73 words)

	Department of Physics - University of Michigan
		Cold atoms can be trapped in optical lattices, which are periodic light-shift potentials generated by multiple interfering laser beams.
		A cryogenic atom trap has been constructed, and is used to determine the significance of collision processes between cold Rydberg atoms and other charged or neutral particles in the evolution of these systems.
		In this experiment, it is also planned to trap cold Rydberg atoms in long-lived states in quasi-static electromagnetic fields and in ponderomotive light-shift potentials.
	www.physics.lsa.umich.edu /department/directory/bio.asp?ID=264 (510 words)

	John M. Doyle Harvard Physics Faculty (Site not responding. Last check: 2007-11-05)
		Trapping increases the precision of these experiments by lengthening interaction times, providing a well-controlled environment, and allowing (in the case of molecules and atoms) for further cooling.
		Trapped UCN should allow for a large improvement in the precision of the measured neutron beta-decay lifetime and asymmetry coefficient.
		Trapping of UCN can be realized by using a magnetic trap in conjunction with a superthermal scattering medium.
	www.physics.harvard.edu /doyle.htm (385 words)

	Spirax Sarco Learning Centre: 11.2 - Steam Traps and Steam Trapping: Thermostatic Steam Traps
		The adjustment allows the temperature of the trap discharge to be altered between 60°C and 100°C, which makes it ideally suited as a device to get rid of large quantities of air and cold condensate at start-up.
		Heat loss from the trap then cools the water surrounding the capsule, the vapour condenses and the capsule contracts, opening the valve and releasing condensate until steam approaches again and the cycle repeats (Figure 11.2.5).
		This type of trap is unlikely to freeze when working in an exposed position (unless there is a rise in the condensate pipe after the trap, which would allow water to run back and flood the trap when the steam is off).
	www.spiraxsarco.com /learn/html/11_2_01.htm (2132 words)

	Traps, Notifications and Informs
		Yes, you can indicate the trap function which instance of the variable should be included in the trap for tables.
		If this is selected and code is generated, it will cause a trap to be sent when a set operation is done on the scalar objects defined in a trap /notification type.
		To send the trap generated by sub-agent through master agent, we have provided a table called Trap Receiver table which can be used to receive the sub-agent traps in the master agent and finally send them to the destination.
	www.adventnet.com /products/cagent/help/faqs/c_snmpfaq_traps.html (1496 words)

	Linear Time Of Flight / TOF / with Liquid Nitrogen Cold Trap
		Ion source elements are enclosed in a gold plated thick wall copper shroud which is normally bolted to the bottom of the D-653 Cold Trap Assembly.
		D-653 COLD TRAP is a bucket type LN cold trap with a flange on the bottom to hold, and provide thermal transfer to the B-654 Ion Source.
		Since it is a bucket trap, it must be operated in a vertical position.
	www.rmjordan.com /d-651.html (682 words)

	Liquid Nitrogen Cold Trap, Liter
		The surface of the cold thimble containing liquid nitrogen at -187°C, being exposed to the vacuum system, rapidly condenses molecules in the vapor phase.
		Pumping speed for water vapor at the trapping surface is 95 liters/sec.
		The vapor pressure for water vapor at the cold thimble is reduced to 10
	www.sisweb.com /vacuum/sis/ln2trap.htm (191 words)

	Dewar Cooldown
		Attach the pump-out valve assembly, including the valve itself and the cold trap, to the fitting on the dewar top plate, then connect a hose from the valve to a pump (preferably the pump that normally lives in the Cornell Lab).
		Note that no cold trap is required on the pumping station; the one mounted on the dewar valve is much more effective because of its proximity to the dewar.
		When the trap is warm, turn off the pump, then remove the valve assembly from the dewar and replace the screw-on cap.
	www.astro.caltech.edu /palomar/200inch/spectrocam/node11.html (1847 words)

	Paratronix Inc. - Parylene Conformal Coatings
		The cold trap should have a local temperature readout, as well as a separate thermocouple and remote control, which monitors the trap temperature.
		It should be interlocked with the initial pump start-up and sound an audible alarm, should the cold trap rise above -65 C. Some type of window or site port should be provided on the chamber, for operator observation of the process.
		Similar to the cold trap insert, the full pyrolysis is easily removed and changed with a spare clean tube, minimizing downtime.
	www.paratronix.com /equip/faq.asp (1046 words)

	Cold Traps
		A cold trap is a condensing device to prevent moisture contamination in a
		Locate the cold trap between the system and vacuum pump.
		Ensure that the cold trap is of sufficient size and cold enough to condense vapors present in the system.
	www.ecu.edu /oehs/LabSafety/ColdTraps.htm (99 words)

	Rebuilt Used MDC Varian Vacuum Pump Liquid Nitrogen Cold Trap
		A vacuum cold trap can be used to prevent back streaming of pump oil.
		This cold trap uses liquid nitrogen as the refrigerant to trap volitile gases and vapors.
		This cold trap is stainless steel and is custom made.
	www.pchemlabs.com /product.asp?pid=331 (116 words)

	[No title]
		For example, the Cambridge filter method agrees with the Grob method for the flue-cured tobacco but with the fermented tobacco there is a large difference; on the other hand the cold trap/ water method and the Grob method agree quite well for both tobaccos.
		Comparis@n of the cold trap/water and the Cambridge filter/water methods was made using several different tobaccos - the results are presented in Table 2.
		7.35 Paraguay (R909) 7.00, 7.11 7.82, 7.80 The pH of the vapour phase was measured by the cold trap/water method by condensing the materials passing through a Cambridge filter in a cold trap cooled in carbon dioxide-acetone mixture.
	www.library.ucsf.edu /tobacco/batco/OCR/1400/1439.txt (641 words)

	Atlas Copco Distributor for Houston, Texas - Tide Air
		The SC or standard Smart Cycle® package uses a high efficiency mechanical separator for liquid collection whereas the CT or Cold Trap® configuration employs a two stage, combination, Moisture Separator/Cold Coalescer, to deliver Oil Free Compressed Air.
		AIRTEK Smart Cycle® and Cold Trap® refrigerated air dryers can operate in either of two energy saving modes; "Cycling" or "Non-Cycling" with demand control.
		The sequence generates a "Thermal Bank" of cold storage in the main heat exchanger.
	www.tideair.com /smartcycle.html (415 words)

	SNMP Overview (Site not responding. Last check: 2007-11-05)
		Cold Start Trap: The NetScreen device generates a cold start trap when it becomes operational after you power it on.
		Each system alarm generates a single NetScreen enterprise SNMP trap to each of the hosts in each community that is set to receive traps.
		Cold Start / Link Up / Link Down traps are sent to all hosts in communities that are set to receive traps.
	25-50.support.netscreen.safeharbor.com /knowbase/root/public/ns10201.htm?&printpage=1 (366 words)

	Baking NOTCam at IJAF (Site not responding. Last check: 2007-11-05)
		After three days of pumping at room temperature, a LN2 cold trap was mounted between NOTCam and the pump.
		Baking was then started, with a cold table temperature of 90C reached after 6 hours.
		The lower surface of the cold trap after opening it the next day, March 16 '99.
	www.astro.ku.dk /~ijaf/NOTCam/cold.html (98 words)

	Vacuum Trap - FTS - vapor system, cold trap
		Vacuum cold traps protect expensive vacuum pumps and eliminate the need for LN2 or dry ice.
		The Titan Trap is the first cold trap to incorporate a titanium helical coil design, to provide maximum efficiency for vacuum trapping of corrosive vapors to -100ºC. Vapor Trap
		The Vapor Trap can cool to a low temperature of -90ºC with a trapping rate up to five liters per hour.
	www.ftssystems.com /vacuumcoldtrap.htm (75 words)

	Group Cold atoms and molecules - Orsay - Open Position (Site not responding. Last check: 2007-11-05)
		The further development of the field of cold molecules can be approached within two different points of view.
		atomic system of cold atoms, in the best conditions of temperature and density, which means an atomic condensate.
		In the same time where we develop a program of formation and trapping of cold molecules, we are involved in the basic
	www.lac.u-psud.fr /coldmolecules/position.html (916 words)

	Cryogenic Cold Trap Systems by Janis Research
		These traps are primarily used in the adsorption of noble gases, including helium, neon, argon, krypton and xenon.
		They are also used to adsorb various oxygen isotopes from meteorites and polar ice caps and ocean island olivines.
		The CCT's are supplied in a variety of customized configurations for operation at precisely controlled temperatures between 8 K and 400 K. These include multiple isothermal traps in one unit, or several multipurpose traps (water vapor, carbon dioxide, oxygen, helium, etc.) in the same system.
	www.janis.com /coldtrap.html (139 words)

	Labconco: CentriVap Cold Traps
		The Traps may also be used in other laboratory applications such as freeze drying and desiccation.
		The CentriVap Cold Trap has a collector that reaches —55° C. The CentriVap Ultra-Low Cold Trap reaches —85° C to protect the pump from low freezing point solvents.
		The CentriVap Cold Trap is available separately or as an integral component of CentriVap Concentration Systems and CentriVap Gel Dryer Systems.
	www.labconco.com /_Scripts/editc25.asp?catid=3 (578 words)

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