Runcinated 5-cell - Revision history

en>Tomruen: /* Images */

2015-01-02T05:14:45Z

Images

← Older revision		Revision as of 07:14, 2 January 2015
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	~~The name of~~ the ~~author~~ is ~~Jayson~~. ~~Mississippi~~ is ~~where his house~~ is. He is an information officer~~. To play lacross is the thing I adore most of all~~.<br><br>~~Here is~~ my web ~~blog :~~: free ~~tarot readings -~~ [http://hknews.classicmall.com.hk/groups/some-simple-tips-for-personal-development-progress/ ~~simply click the following internet page~~] -		Golda is what's written on my beginning certification even though it is not the title on my birth certification. North Carolina is the location he enjoys most but now he is considering other choices. Playing love psychic readings - [http://chungmuroresidence.com/xe/reservation_branch2/152663 chungmuroresidence.com] - badminton is a factor that he is completely accurate psychic readings ([http://conniecolin.com/xe/community/24580 Highly recommended Internet site]) addicted to. He is an information officer.<br><br>my web site: free psychic ([http://hknews.classicmall.com.hk/groups/some-simple-tips-for-personal-development-progress/ hknews.classicmall.com.hk])

en>Tomruen: /* Omnitruncated 5-cell */

2014-02-09T21:10:12Z

Omnitruncated 5-cell

← Older revision		Revision as of 23:10, 9 February 2014
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	~~{{Unreferenced\|date=December 2009}}~~		The name of the author is Jayson. Mississippi is where his house is. He is an information officer. To play lacross is the thing I adore most of all.<br><br>Here is my web blog :: free tarot readings - [http://hknews.classicmall.com.hk/groups/some-simple-tips-for-personal-development-progress/ simply click the following internet page] -
	~~[[File:Hollow Cathode Lamp.svg\|thumb\|300px\|Basic diagram~~ of ~~a hollow-cathode lamp~~.]]
	~~[[File:Hollow cathode lamp~~.~~JPG\|thumb\|300px\|Hollow-cathode lamps from an [[atomic absorption spectrometer]]]]~~
	~~A '''hollow-cathode lamp''' (HCL)~~ is ~~type of lamp used in [[physics]] and [[chemistry]] as a [[spectral line]] source (e.g. for [[atomic absorption spectrometer]]s) and as a [[frequency]] tuner for light sources such as [[laser]]s.~~

	~~An HCL usually consists of a [[glass]] tube containing a [[cathode]],~~ an ~~[[anode]], and a buffer [[gas]] (usually a [[noble gas]])~~. A large [[voltage]] across the anode and cathode will cause the [[buffer gas]] to [[ionization\|ionize]], creating a [[plasma (physics)\|plasma]]. The buffer gas ions will then be accelerated into the cathode, [[sputtering]] off atoms from the cathode. Both the buffer gas and the sputtered cathode atoms will in turn be [[Excited state\|excited]] by [[collision]]s with other atoms/particles in the plasma. As these excited atoms decay to lower states, they will emit [[photon]]s, which can then be detected and a spectrum can be determined. Either the spectrum from the buffer gas or the sputtered cathode material itself, or both, may be of ~~interest~~.

	An HCL can also be used to tune light sources to a specific atomic transition by making use of the [[optogalvanic effect]], which is a result of direct or indirect [[photoionization]]. By shining the light source into the HCL, one can excite or even eject [[electron]]s (directly photoionize) from the atoms inside the lamp, so long as the light source includes frequencies corresponding to the right atomic transitions. Indirect photoionization can then occur when electron collisions with the excited atom eject an atomic electron.

	# <~~math~~>A + h \nu \rightarrow A^*<~~/math~~>
	~~# <math>A^* + e^~~- ~~\rightarrow A^+ + 2e^-<~~/~~math>~~
	~~<math>A<~~/~~math> = atom, <math>h \nu<~~/~~math> = photon, <math>A^*<~~/~~math> = atom in excited state, and <math>e^~~-~~</math> = electron~~

	~~The newly created ions cause an increase in the current across the cathode~~/~~anode and a resulting change in the voltage, which can then be measured.~~

	~~To tune the light source to a specific transition frequency, a tuning parameter (often~~ the ~~driving [[Electric current\|current]~~]) of the light source is varied. By looking for a [[resonance]] on a [[data plot]] of the voltage signal versus source tuning parameter, the light source can be tuned to the desired frequency. This is often aided by use of a [[Lock-in amplifier\|lock-~~in]] circuit.~~

	~~==See also==~~
	*[[List of light sources]]
	* [[Electrodynamic_tether#Hollow_cathode]]

	~~{{Artificial light sources}}~~

	~~[[Category:Atomic physics]]~~
	~~[[Category:Optical devices]]~~
	~~[[Category:Gas discharge lamps]]~~

195.240.100.81: /* Root vectors */ 5-cell is 4-simplex! 5-simplex is not in 4-space.

2013-10-06T16:55:30Z

Root vectors: 5-cell is 4-simplex! 5-simplex is not in 4-space.

← Older revision		Revision as of 18:55, 6 October 2013
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	~~I would like to introduce myself to you, I am Jayson Simcox but I don't like when people use my full name~~. ~~For~~ a ~~while I've been tarot readings~~ [[~~http~~:~~//netwk~~.~~hannam~~.ac.~~kr/xe/data_2/85669 netwk~~.~~hannam~~.ac.kr]] in ~~Mississippi but now I'm considering~~ other ~~choices~~. ~~Distributing production is exactly where my main earnings comes~~ from ~~and it's some thing I truly enjoy~~. ~~Playing badminton~~ is a ~~factor that he is completely addicted~~ ~~best psychic~~ (~~[http://www~~.~~010-5260-5333~~.~~com~~/~~index.php?document_srl=1880&mid=board_ALMP66 http://www.010~~-~~5260~~-~~5333.com~~/~~index.php?document_srl~~=~~1880&mid~~=~~board_ALMP66]) to.~~<br><br>~~Also visit my blog; email psychic readings ([http:~~//~~black7~~.~~mireene~~.~~com/aqw/5741 black7~~.~~mireene~~.~~com~~])		{{Unreferenced\|date=December 2009}}
			[[File:Hollow Cathode Lamp.svg\|thumb\|300px\|Basic diagram of a hollow-cathode lamp.]]
			[[File:Hollow cathode lamp.JPG\|thumb\|300px\|Hollow-cathode lamps from an [[atomic absorption spectrometer]]]]
			A '''hollow-cathode lamp''' (HCL) is type of lamp used in [[physics]] and [[chemistry]] as a [[spectral line]] source (e.g. for [[atomic absorption spectrometer]]s) and as a [[frequency]] tuner for light sources such as [[laser]]s.

			An HCL usually consists of a [[glass]] tube containing a [[cathode]], an [[anode]], and a buffer [[gas]] (usually a [[noble gas]]). A large [[voltage]] across the anode and cathode will cause the [[buffer gas]] to [[ionization\|ionize]], creating a [[plasma (physics)\|plasma]]. The buffer gas ions will then be accelerated into the cathode, [[sputtering]] off atoms from the cathode. Both the buffer gas and the sputtered cathode atoms will in turn be [[Excited state\|excited]] by [[collision]]s with other atoms/particles in the plasma. As these excited atoms decay to lower states, they will emit [[photon]]s, which can then be detected and a spectrum can be determined. Either the spectrum from the buffer gas or the sputtered cathode material itself, or both, may be of interest.

			An HCL can also be used to tune light sources to a specific atomic transition by making use of the [[optogalvanic effect]], which is a result of direct or indirect [[photoionization]]. By shining the light source into the HCL, one can excite or even eject [[electron]]s (directly photoionize) from the atoms inside the lamp, so long as the light source includes frequencies corresponding to the right atomic transitions. Indirect photoionization can then occur when electron collisions with the excited atom eject an atomic electron.

			# <math>A + h \nu \rightarrow A^*</math>
			# <math>A^* + e^- \rightarrow A^+ + 2e^-</math>
			<math>A</math> = atom, <math>h \nu</math> = photon, <math>A^*</math> = atom in excited state, and <math>e^-</math> = electron

			The newly created ions cause an increase in the current across the cathode/anode and a resulting change in the voltage, which can then be measured.

			To tune the light source to a specific transition frequency, a tuning parameter (often the driving [[Electric current\|current]]) of the light source is varied. By looking for a [[resonance]] on a [[data plot]] of the voltage signal versus source tuning parameter, the light source can be tuned to the desired frequency. This is often aided by use of a [[Lock-in amplifier\|lock-in]] circuit.

			==See also==
			*[[List of light sources]]
			* [[Electrodynamic_tether#Hollow_cathode]]

			{{Artificial light sources}}

			[[Category:Atomic physics]]
			[[Category:Optical devices]]
			[[Category:Gas discharge lamps]]

en>Tomruen: /* Omnitruncated 5-cell */

2012-07-31T03:09:12Z

Omnitruncated 5-cell

New page

I would like to introduce myself to you, I am Jayson Simcox but I don't like when people use my full name. For a while I've been tarot readings [[http://netwk.hannam.ac.kr/xe/data_2/85669 netwk.hannam.ac.kr]] in Mississippi but now I'm considering other choices. Distributing production is exactly where my main earnings comes from and it's some thing I truly enjoy. Playing badminton is a factor that he is completely addicted best psychic ([http://www.010-5260-5333.com/index.php?document_srl=1880&mid=board_ALMP66 http://www.010-5260-5333.com/index.php?document_srl=1880&mid=board_ALMP66]) to.<br><br>Also visit my blog; email psychic readings ([http://black7.mireene.com/aqw/5741 black7.mireene.com])