Syed LCS G4ModelPaper - Revision history

Oborn: /* References */

2009-05-01T15:28:42Z

References

2009-04-27T19:15:12Z

Apparatus

2009-04-27T19:14:37Z

Apparatus

2009-03-13T15:59:24Z

Compton scattering equation

2009-03-13T15:58:53Z

Apparatus

2009-03-13T15:51:34Z

Theory

2009-03-13T15:50:29Z

Theory

2009-03-13T15:29:29Z

Introduction

2009-03-13T15:29:09Z

2009-03-13T03:32:56Z

Theory

← Older revision		Revision as of 15:28, 1 May 2009
Line 68:		Line 68:
	BNL-		BNL-

		+
		+	4.) Compton polarization G4 model
		+	http://www-zeuthen.desy.de/~dreas/geant4/

	Acknowledgements. The authors gratefully acknowledge the support of this project from the Department of Defense (DOD) under contract, DOD#FA8650-04-2-6541.		Acknowledgements. The authors gratefully acknowledge the support of this project from the Department of Defense (DOD) under contract, DOD#FA8650-04-2-6541.

@@ Line 36: / Line 36: @@
   Insert diagram of electron accelerator and laser (boxes) and electron - photon symbols.
-Then next to it put a Lab Frame coordinate system with variables.
+ Then next to it put a Lab Frame coordinate system with variables.
-Then a CM frame coordinate system with variables
+ Then a CM frame coordinate system with variables
 ==Physics Model==

@@ Line 35: / Line 35: @@
 ==Apparatus==
-  Insert diagram of electron accelerator and laser (boxes) and electron - photon symbols.  Then next to it put a Lab Frame coordinate system with variables.  Then a CM frame coordinate system with variables
+  Insert diagram of electron accelerator and laser (boxes) and electron - photon symbols.
 ==Physics Model==

@@ Line 39: / Line 39: @@
 ==Physics Model==
 ===Compton scattering equation===
 ===Transformation to electron rest frame===

@@ Line 34: / Line 34: @@
 ==Apparatus==
-===Geometry===
 ==Physics Model==

← Older revision		Revision as of 15:51, 13 March 2009
Line 23:		Line 23:


−	Start with Klein-Nishina paper then go to ~~Sedik~~	+	Start with Klein-Nishina paper then go to Stepanek paper. Paraphrase contents, use your own words, include necessary formula
		+

	The differential cross section describing the Compton scattering of a photon by an electron at rest is given by the Klein-Nishina formula ~\cite{KleinNishina1929} as:		The differential cross section describing the Compton scattering of a photon by an electron at rest is given by the Klein-Nishina formula ~\cite{KleinNishina1929} as:

← Older revision		Revision as of 15:50, 13 March 2009
Line 22:		Line 22:
	===Theory===		===Theory===

		+
		+	Start with Klein-Nishina paper then go to Sedik

	The differential cross section describing the Compton scattering of a photon by an electron at rest is given by the Klein-Nishina formula ~\cite{KleinNishina1929} as:		The differential cross section describing the Compton scattering of a photon by an electron at rest is given by the Klein-Nishina formula ~\cite{KleinNishina1929} as:

@@ Line 7: / Line 7: @@
 ==Introduction==
 Tunable and quasi-monochromatic laser Compton scattered (LCS) X-rays are produced as a result of the interaction between accelerated electrons and a laser beam. The energy tunability of LCS X-rays is dependent on the incoming electron and laser beam energies.
@@ Line 20: / Line 19: @@
 Previously, two 20.94 keV and 98.4 keV LCS peaks, having a FWHM =  ???, were produced at the Idaho Accelerator Center (IAC) in two separate experiments using electron beam energies of ~34 MeV and ~37 MeV respectively that intersected a 4 GigaWatt peak power Nd:YAG laser operating at wavelengths of 1064 nm and 266 nm. The electron linear accelerator (linac) was operating at 60 Hz with an electron beam pulse length of 50 ps and a peak current of 7 Amps. A simulation has been performed using a Geant4 Monte Carlo simulation toolkit to further understand features of the experimental yield, such as the influence of the energy distribution of the incoming electron beam. A comparison between simulated and experimental LCS X-rays of ~20 keV and ~98 keV as well as radiographic images of fish and lead samples will be shown.

@@ Line 3: / Line 3: @@
 ==Abstract==
 Tunable and quasi-monochromatic laser Compton scattered (LCS) X-rays are produced as a result of the interaction between accelerated electrons and a laser beam. The energy tunability of LCS X-rays is dependent on the incoming electron and laser beam energies.
@@ Line 14: / Line 20: @@
 Previously, two 20.94 keV and 98.4 keV LCS peaks, having a FWHM =  ???, were produced at the Idaho Accelerator Center (IAC) in two separate experiments using electron beam energies of ~34 MeV and ~37 MeV respectively that intersected a 4 GigaWatt peak power Nd:YAG laser operating at wavelengths of 1064 nm and 266 nm. The electron linear accelerator (linac) was operating at 60 Hz with an electron beam pulse length of 50 ps and a peak current of 7 Amps. A simulation has been performed using a Geant4 Monte Carlo simulation toolkit to further understand features of the experimental yield, such as the influence of the energy distribution of the incoming electron beam. A comparison between simulated and experimental LCS X-rays of ~20 keV and ~98 keV as well as radiographic images of fish and lead samples will be shown.
@@ Line 56: / Line 57: @@
 BNL-
 [http://wiki.iac.isu.edu/index.php/LaserComptonScat#LCS_model_paper Go Back] [[LaserComptonScat]]

@@ Line 24: / Line 24: @@
 :<math>\frac{d \sigma}{d \Omega} = \frac{r_e^2}{2} \frac{1 + \cos^2(\theta) + \frac{\xi^2 \left [ 1+ \cos(\theta) \right ]^2}{1 + \xi \left( 1+ \cos(\theta) \right)}}{\left[ 1+ \xi (1-\cos(\theta) ) \right ]^2}</math>
-where
+where <math>r_e</math> is the bohr radius, <math>\theta</math> is the electron photon scattering angle and
 : <math>\xi = \frac{h \nu}{m_e c^2} = \frac{E_{\gamma}}{E_0^{e^-}} </math>