Collimator - Revision history

Oborn: /* Summary */

2008-01-14T16:36:32Z

Summary

Oborn: /* JLAB Collimator design 8/7/07 */

2007-12-11T16:43:05Z

JLAB Collimator design 8/7/07

Oborn at 16:26, 11 December 2007

2007-12-11T16:26:48Z

Oborn: /* JLAB Collimator design 6/14/07 */

2007-12-11T16:24:42Z

JLAB Collimator design 6/14/07

Oborn: /* Summary */

2007-12-06T17:04:12Z

Summary

Oborn: /* JLAB Collimator design 6/14/07 */

2007-12-05T20:06:01Z

JLAB Collimator design 6/14/07

Oborn: /* JLAB Collimator design 6/14/07 */

2007-12-05T18:49:16Z

JLAB Collimator design 6/14/07

Oborn: /* JLAB Collimator design 6/14/07 */

2007-12-05T18:42:05Z

JLAB Collimator design 6/14/07

Oborn: /* JLAB Collimator design 6/14/07 */

2007-12-05T18:41:46Z

JLAB Collimator design 6/14/07

Oborn: /* JLAB Collimator design 6/14/07 */

2007-12-05T18:40:13Z

JLAB Collimator design 6/14/07

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 ==Summary==
-It looks like the collimator has a new lower radial limit of 7.03 cm compared with the previous limit of 6.2 cm shown in the drawing on 6/14/07 above.  This gives us about 8.3 mm of more space for chamber material between the beam pipe and the collimator opening at the backside of the first collimator.
+It looks like the collimator has a new lower radial limit of 7.03 cm compared with the previous limit of 6.2 cm shown in the drawing on 6/14/07 above.  This gives us about 8.3 mm of more space for chamber material between the beam pipe and the collimator opening at the backside of the first collimator.  The upper radius in the new design is 18.46 cm and before the drawing showed 19.3 cm (13.1 + 6.2).  This represents a change of 0.96 cm.  So the aperture of the collimator has decreased in size radially by 1.8 cm.
 The smallest width of the collimator is now 3.82 cm. Measuring the width of the already manufactured GEM foils for Qweak, I see the smallest width is 4 cm.  The width is 4.5 cm at a radial distance of 0.8 cm away from the edge of the GEM foil.  If the GEm detector were placed right up against the backside of Collimator 1 then there would be more than enough space.  We will need to look at elastic electron profile to determine how things look at the GEM location.
 [http://www.iac.isu.edu/mediawiki/index.php/Qweak Go Back]

← Older revision		Revision as of 16:43, 11 December 2007
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−	From Paulo's Drawing "Hall -V QWEAK EXPERIMENT COLLIMATOR BUNKER SETUP UPSTREAM ~~CLEAUP~~ COLLIMATOR" # 67503-E-00021 dated 8/8/07 I saw the following description of what I believe is the backside of collimator 1.	+	From Paulo's Drawing "Hall -V QWEAK EXPERIMENT COLLIMATOR BUNKER SETUP UPSTREAM CLEANUP COLLIMATOR" # 67503-E-00021 dated 8/8/07 I saw the following description of what I believe is the backside of collimator 1.

	[[Image:Collimator-11-29-07_BackSide.jpg \| 400 px]]		[[Image:Collimator-11-29-07_BackSide.jpg \| 400 px]]

← Older revision		Revision as of 16:26, 11 December 2007
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	The smallest width of the collimator is now 3.82 cm. Measuring the width of the already manufactured GEM foils for Qweak, I see the smallest width is 4 cm. The width is 4.5 cm at a radial distance of 0.8 cm away from the edge of the GEM foil. If the GEm detector were placed right up against the backside of Collimator 1 then there would be more than enough space. We will need to look at elastic electron profile to determine how things look at the GEM location.		The smallest width of the collimator is now 3.82 cm. Measuring the width of the already manufactured GEM foils for Qweak, I see the smallest width is 4 cm. The width is 4.5 cm at a radial distance of 0.8 cm away from the edge of the GEM foil. If the GEm detector were placed right up against the backside of Collimator 1 then there would be more than enough space. We will need to look at elastic electron profile to determine how things look at the GEM location.
		+
		+	[http://www.iac.isu.edu/mediawiki/index.php/Qweak Go Back]

← Older revision		Revision as of 16:24, 11 December 2007
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	I do not see any major changes so I conclude that the collimator has not changed and the montecarlo results for the profiles of elastic electrons are still valid.		I do not see any major changes so I conclude that the collimator has not changed and the montecarlo results for the profiles of elastic electrons are still valid.

−	= JLAB Collimator design 6/14/07=	+	= JLAB Collimator design 8/7/07=

← Older revision		Revision as of 17:04, 6 December 2007
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	It looks like the collimator has a new lower radial limit of 7.03 cm compared with the previous limit of 6.2 cm shown in the drawing on 6/14/07 above. This gives us about 8.3 mm of more space for chamber material between the beam pipe and the collimator opening at the backside of the first collimator.		It looks like the collimator has a new lower radial limit of 7.03 cm compared with the previous limit of 6.2 cm shown in the drawing on 6/14/07 above. This gives us about 8.3 mm of more space for chamber material between the beam pipe and the collimator opening at the backside of the first collimator.

−	The smallest width of the collimator is now 3.82 cm. Measuring the width of the already manufactured GEM foils for Qweak, I see the smallest width is 4 cm. The width is 4.5 cm at a radial distance of 0.8 cm away from the edge of the GEM foil.	+	The smallest width of the collimator is now 3.82 cm. Measuring the width of the already manufactured GEM foils for Qweak, I see the smallest width is 4 cm. The width is 4.5 cm at a radial distance of 0.8 cm away from the edge of the GEM foil. If the GEm detector were placed right up against the backside of Collimator 1 then there would be more than enough space. We will need to look at elastic electron profile to determine how things look at the GEM location.

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 = JLAB Collimator design 6/14/07=
-On June 14, 2007, I went to Paulo Dedeiros's office on the 5th floor of the ARC cubicle 43 (500-43).  I got him to output the pdf file below which describes the back side of the first collimator in Qweak.
+On June 14, 2007, I went to Paulo Dedeiros's office on the 5th floor of the ARC cubicle 43 (500-43).  He output the pdf file below which describes the back side of the first collimator in Qweak.
 [[Image:Collimator-06-14-07.pdf ]] <br>

← Older revision		Revision as of 18:49, 5 December 2007
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	==Summary==		==Summary==

−	It looks like the collimator has a new lower radial limit of 7.03 cm compared with the previous limit of 6.2 cm shown in the	+	It looks like the collimator has a new lower radial limit of 7.03 cm compared with the previous limit of 6.2 cm shown in the drawing on 6/14/07 above. This gives us about 8.3 mm of more space for chamber material between the beam pipe and the collimator opening at the backside of the first collimator.
		+
		+	The smallest width of the collimator is now 3.82 cm. Measuring the width of the already manufactured GEM foils for Qweak, I see the smallest width is 4 cm. The width is 4.5 cm at a radial distance of 0.8 cm away from the edge of the GEM foil.

← Older revision		Revision as of 18:42, 5 December 2007
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	==Summary==		==Summary==

−	It looks like the collimator has a new lower radial limit of 7.03 cm compared with the previous limit of shown in the	+	It looks like the collimator has a new lower radial limit of 7.03 cm compared with the previous limit of 6.2 cm shown in the

← Older revision		Revision as of 18:41, 5 December 2007
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	From Paulo's Drawing "Hall -V QWEAK EXPERIMENT COLLIMATOR BUNKER SETUP UPSTREAM CLEAUP COLLIMATOR" # 67503-E-00021 dated 8/8/07 I saw the following description of what I believe is the backside of collimator 1.		From Paulo's Drawing "Hall -V QWEAK EXPERIMENT COLLIMATOR BUNKER SETUP UPSTREAM CLEAUP COLLIMATOR" # 67503-E-00021 dated 8/8/07 I saw the following description of what I believe is the backside of collimator 1.
		+
	[[Image:Collimator-11-29-07_BackSide.jpg \| 400 px]]		[[Image:Collimator-11-29-07_BackSide.jpg \| 400 px]]
		+
		+	==Summary==
		+
		+	It looks like the collimator has a new lower radial limit of 7.03 cm compared with the previous limit of shown in the

← Older revision		Revision as of 18:40, 5 December 2007
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	From Paulo's Drawing "Hall -V QWEAK EXPERIMENT COLLIMATOR BUNKER SETUP UPSTREAM CLEAUP COLLIMATOR" # 67503-E-00021 dated 8/8/07 I saw the following description of what I believe is the backside of collimator 1.		From Paulo's Drawing "Hall -V QWEAK EXPERIMENT COLLIMATOR BUNKER SETUP UPSTREAM CLEAUP COLLIMATOR" # 67503-E-00021 dated 8/8/07 I saw the following description of what I believe is the backside of collimator 1.
−	[[~~ImageCollimator~~-11-29-07_BackSide.jpg \| 400 px]]	+	[[Image:Collimator-11-29-07_BackSide.jpg \| 400 px]]