Difference between revisions of "Interim Report 5-18-08 AwardNum0653570"

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====Preamplifier design and procurement====
 
====Preamplifier design and procurement====
  
The figure below shows the custom designed GEM preamplifier for the Qweak Region 1 tracking system.  The preamplifier is simply a 50 micron thick kapton foil clad on both sides with copper.  Holes are etched into the foil such that a voltage applied across the upper and lower copper plates will create an electric field strong enough to cause charge to pass through the hole and multiply but like the avalanche region of a drift chamber.    Enigneers from the Idaho Accelerator center designed the shape of the foils and the location of 6 tabs used for HV connections.  This generic design allows one to use the part for any GEM amplification stage simply by cutting off the unused HV tabs.  Although this is a simple part, it is a clear example of how the infrastructure at the IAC can be leveraged in support of our physics mission.
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The figure below shows the custom designed GEM preamplifier for the Qweak Region 1 tracking system.  The preamplifier is a 50 micron thick kapton foil clad on both sides with 5 microns of copper.  Holes are etched into the foil such that a voltage applied across the upper and lower copper plates will create an electric field strong enough to cause charge to pass through the hole and multiply but like the avalanche region of a drift chamber.    Enigneers from the Idaho Accelerator center designed the shape of the foils and the location of 6 tabs used for HV connections.  This generic design allows one to use the part for any GEM amplification stage simply by cutting off the unused HV tabs.  Although this is a simple part, it is a clear example of how the infrastructure at the IAC can be leveraged in support of our physics mission.
  
 
[[Image:Qweak_GEM_preamp.jpg]]
 
[[Image:Qweak_GEM_preamp.jpg]]

Revision as of 15:40, 21 June 2008

Participants

		Tony Forest	   Principal Investigator	Yes
		Julian Salamanca	   Graduate student	No
		Tamar Didberidze	   Graduate student	Yes
		Jordan Keough	   Undergraduate student	No
		Jeremy Lebaron	   Undergraduate student	Yes

Activities and Findings

This section will serve as your report to your program officer of your project's activities and findings. Please describe what you have done and what you have learned, broken down into four categories:

Describe the major research and education activities of the project.

Describe the major findings resulting from these activities.

Describe the opportunities for training and development provided by your project.

Describe outreach activities your project has undertaken.

could click "Nothing Yet to report"

What have been your major research and education activities (experiments, observations, simulations,presentations, etc.)

Qweak Ionization Chamber construction

The three major components to the Qweak Region 1 detector are the GEM preamplifiers, the charge collector, and the ionization chamber.

Preamplifier design and procurement

The figure below shows the custom designed GEM preamplifier for the Qweak Region 1 tracking system. The preamplifier is a 50 micron thick kapton foil clad on both sides with 5 microns of copper. Holes are etched into the foil such that a voltage applied across the upper and lower copper plates will create an electric field strong enough to cause charge to pass through the hole and multiply but like the avalanche region of a drift chamber. Enigneers from the Idaho Accelerator center designed the shape of the foils and the location of 6 tabs used for HV connections. This generic design allows one to use the part for any GEM amplification stage simply by cutting off the unused HV tabs. Although this is a simple part, it is a clear example of how the infrastructure at the IAC can be leveraged in support of our physics mission.

Qweak GEM preamp.jpg

Charge Collector Design and procurement

The charge collector for Qweak's region 1 tracking system is shown below. BOTTOM copper.jpgTOP copper.jpg

Ionization Chamber design

Qweak readout electronics

VFAT board

VFATtop.jpgVFATbottom.jpg

I2C communication

I2c scope write 42.xfig.png


VFAT WebinterfaceScreenshot.jpg

Readout switchyard

BreakOutBox.jpg

R3 tests

What are your major findings from the activities identified above

Qweak readout electronics

Spead test results

VFAT communication protocols

Publications and Products

In this section, you will be asked to describe the tangible products coming out of your project. Specifically:

What have you published as a result of this work? Journal publications

Books or other non-periodical, one-time publications

What Web site or other Internet site have you created?

What other specific products (databases, physical collections, educational aids, software, instruments, or the like) have you developed?

What have you published as a result of this work?

Journal publications

Books or other non-periodical, one-time publications

What Web site or other Internet site have you created?

Wiki

What other specific products (databases, physical collections, educational aids, software, instruments, or the like) have you developed?

Contributions

Now we invite you to explain ways in which your work, your findings, and specific products of your project are significant. Describe the unique contributions, major accomplishments, innovations and successes of your project relative to :

the principal discipline(s) of the project;

other disciplines of science or engineering;

the development of human resources;

the physical, institutional, or information resources that form the infrastructure for research and education; and

other aspects of public welfare beyond science and engineering, such as commercial technology, the economy, cost-efficient environmental protection, or solutions to social problems.

How have your findings, techniques you developed or extended, or other products from your project contributed to the principal disciplinary field(s) of the project?

Special Requirements

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