Difference between revisions of "2012 NSF Proposal"

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=Physics topics=
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=Project Summary=
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[[File:2011projectSummary.pdf]]
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==Intellectual Merit==
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\begin{center}
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{\it \underline {The Intellectual Merit of the Proposed Activities}}
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\end{center}
 +
 
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The intermediate energy nuclear physics group at Idaho State University (ISU) has an established fundamental physics program, based at Jefferson Lab, to enhance our understanding of nucleons and nuclei. 
 +
The CoPIs in this proposal are all co-spokespersons on experiments to perform measurements on the underlying symmetry and structure of the quark and gluon components of the nucleon, the size of the proton, and the characteristics of the skin or surface of a nucleus.  Dr.~Tony Forest is continuing a measurement of the down quark fractional polarization in the nucleon to test predictions of pQCD via experiment PR12-06-109.  Dr.~Philip Cole is co-spokesperson on PR12-09-003, an experiment to study the excited state of the nucleon.
 +
Dr.~Mahbub Khandaker will conduct a high-precision measurement of the proton charge radius in experiment E12-11-106 to resolve a current discrepancy between the proton radius extracted from muonic and electronic hydrogen experiments. Dr~Dustin McNulty is continuing his work using parity violation to precisely measure the neutron skin of lead and calcium to test nuclear model predictions of the difference between the radii of protons and neutrons in a heavy nucleus.  Two graduate students have recently obtained their PhDs, one will soon graduate, and three more are currently working on comprehensive measurements of vector meson and hyperon photoproduction employing linearly polarized photons to improve our understanding of the underlying symmetry of the quark degrees of freedom in the nucleon, the nature of the parity exchange between the incident photon and the target nucleon, and the mechanism of associated strangeness production in electromagnetic reactions.
 +
 
 +
==Broader Impacts==
 +
 
 +
\begin{center}
 +
{\it \underline {Broader Impacts of the Proposed Activities}}
 +
\end{center}
 +
 
 +
In addition to the scientific program described here, this proposal represents a major effort in the area of educating future scientists. The present shortage of graduate students in experimental and theoretical nuclear physics is having a detrimental impact on our national laboratories and facilities which posses a plethora of data but limited manpower for analyzing and disseminating the information. The Idaho State University Department of Physics is comprised of nine tenure-track faculty, all of whom have research interests which are in some way connected to nuclear physics and are in a position to directly address the shortage of graduate students. With its on campus accelerator and detector laboratories, the Department focuses on experimental and applied physics, giving students a strong hands-on educational experience. ISU's physics program is relatively new and is rapidly growing.
 +
 
 +
 
 +
The PIs are further strengthening the ISU graduate program by recruiting high-caliber students from Latin America. Latin America remains an underutilized intellectual resource. The ISU Group has strong ties to Colombia and has attracted four talented graduate students into nuclear physics at ISU; three are working on JLab-related projects and one graduated in late 2009 and is now an Assistant Professor in Bogot\'{a}, Colombia. The activities delineated within this proposal will provide another avenue through which the program can continue to solidify this mutually beneficial bridge of collaboration among countries in the Americas.
 +
 
 +
=Project Description=
 +
==Introduction==
 +
 
 +
 
 +
 
 +
We propose to perform measurements using electromagnetic probes at Jefferson Lab that will enhance our fundamental understanding of nucleons and nuclei.  The experiments within this proposal perform measurements of a nucleon's constituents, the size of the proton, and the surface of a nucleus.
 +
 
 +
==CLAS Polarized Structure Function==
 +
 
 +
[[NSF_2012_CLAS_PSF]]
 +
 
 +
== Projects Table==
 +
 
 +
 
 +
{| border="1"  |cellpadding="20" cellspacing="0
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|-
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| Project || Personnel || Status || pgs
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|-
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| <math> \frac{\Delta d}{d}</math> Polarization|| Forest||  Approved ||2
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|-
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| N*  || Cole ||  Approved || 3
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|-
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|<math>G_E^p(Q^2=0)</math>|| Khandaker , McNulty ||  Approved ||2
 +
|-
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| PV (nucleus size, weak mixing angle, astro physics) || McNulty ||  Cond. Approved || 3
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|}
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===== The CLAS12 Polarized Structure Function Program =====
 
  
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\paragraph{The CLAS12 Polarized Structure Function Program}
 
  
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Spin structure functions of the nucleon have been measured in deep inelastic lepton scattering (DIS) for nearly 30 years since the first experiments at SLAC. Interest increased substantially in the 80s when the EMC collaboration reported that quarks only made a small contribution to the overall spin of the proton, according to their data. This ``spin crisis" led to a vigorous theoretical and experimental effort over the next 20 years, with a large data set collected at CERN, SLAC, DESY, and JLab.
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==Budget Justification Table==
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 +
{| border="1"  |cellpadding="20" cellspacing="0
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|-
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| 3 year Costs|| Description
 +
|-
 +
|500 || Ar/Co2 detector gases, LN2 coolant for target tests
 +
|-
 +
| 4500 || VME based module
 +
|-
 +
| 5000 || NIM bin electronics
 +
|-
 +
| 15000 || PMTs and bases
 +
|-
 +
| 9000 || raw construction materials for R & D tests
 +
|-
 +
| 6000 ||
 +
|-
 +
|20000 ||
 +
|}
  
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Interest in the quark contribution to a nucleon's structure continues unabated. At large Bjorken $x$, new data from JLab address for the first time the question of the helicity structure of the nucleon in a kinematic realm where sea quark and gluon contributions are minimal thereby making one mostly sensitive to valence quarks. An example of these results is shown in Fig.~\ref{deltadJLab}. To extend this region to higher $x$ and moderate $Q^2$, one needs higher beam energies than presently available at JLab. In particular, to test various models of the asymptotic value of the virtual photon asymmetry $A_1(x)$ as $x \rightarrow 1$, one needs the upgraded CEBAF with 12~GeV beam energy.
 
  
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==Stuff==
  
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\singlespace
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5 students
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\begin{figure} [t]
 
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\begin{center}
 
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{
 
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\scalebox{0.4} [0.5]{\includegraphics[height=5in]{figs/DeltaDoverD_CLAS12.eps}}
 
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}
 
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\caption{The expected statistical uncertainty of a $\Delta d/d$ measurement from CLAS12.  The dashed line represents a pQCD prediction while the solid line represents the prediction from a hyperfine perturbed constituent quark model. The solid triangles are measurements from X.~Zheng {\it et al.}~\cite{Zhang}, and the diamonds are from A.~Airapetian {\it et al.}~\cite{AirapetianHERMES}. The squares represent a prediction of the precision obtained by a SIDIS measurement performed using the energy upgraded CEBAF and the upgraded CLAS. The risers represent systematic uncertainty and the error bar lines are statistical uncertainties.}
 
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\label{deltadJLab}
 
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\end{center}
 
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\end{figure}
 
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\doublespace
 
  
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Section on training our JLab students in Hardware
  
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The comprehensive data set to be collected by experiment PR12-06-109 will contribute substantially to our knowledge of polarized parton distribution functions for all quark flavors and even the polarized gluon distribution $\Delta g$. Through Next-to-Leading Order (NLO) analysis of the world data on inclusive DIS (using the DGLAP evolution equations), one can constrain these distribution functions and their integrals. Existing CLAS data from 6 GeV have already made an impact on these fits. The expected data from the proposed experiment at 11~GeV will further reduce the uncertainties of these distributions. Semi-inclusive DIS (SIDIS) data will also be collected, where, in addition to the scattered electron,  hadrons produced after the struck quark hadronizes are also detected. These data will further constrain the NLO fits and improve the separation of the various quark flavors' contribution to nucleon observables.
 
  
 +
Student do physics at JLab and gain experience with hardware using  ISU facilities.
  
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{| border="1"  |cellpadding="20" cellspacing="0
+
CLAS can also be categorized as a bunch of "One off" experiments. Perhaps review publication record of the experiments.  PV experiments take 10 years from construction to publication some CLAS experiments took less.
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|-
 
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| [[File:DeltaDoverD_CLAS12.png]]
 
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|-
 
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| The dashed line represents a pQCD prediction while the solid line represents the prediction from a hyperfine perturbed constituent quark model.  The solid triangles are measurements from X.~Zheng {\it et al.}, Phys.~Rev.~Lett.~92 (2004) 012004 and the diamonds are from Phys.Rev.D71:012003,2005.  The squares represent a prediction of the precision obtained by a SIDIS measurement performed using and energy upgrade CEBAF and the upgraded CLAS. The risers represent systematic uncertainty and the error bar lines are statistical uncertainties.
 
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|}<br>
 
  
  
 +
  
 
[[NSF]]
 
[[NSF]]

Latest revision as of 01:50, 31 October 2012

The competition

000416256

JeV

Institution 2 year Budget Physics
ASU 340 http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=0969201
Rutgers 800 http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=0969239
CS LA 264 http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=0969380
Catholic 328 http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=0969434
Catholic 311 http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1019521
Ohio U 484 http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=0969297
Hampton 509 http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1002644
RPI 520 http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=0965606
Kent State 465 http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=0969129
Ohio Univ 327 http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=0969788


Project Summary

File:2011projectSummary.pdf

Intellectual Merit

\begin{center} {\it \underline {The Intellectual Merit of the Proposed Activities}} \end{center}

The intermediate energy nuclear physics group at Idaho State University (ISU) has an established fundamental physics program, based at Jefferson Lab, to enhance our understanding of nucleons and nuclei. The CoPIs in this proposal are all co-spokespersons on experiments to perform measurements on the underlying symmetry and structure of the quark and gluon components of the nucleon, the size of the proton, and the characteristics of the skin or surface of a nucleus. Dr.~Tony Forest is continuing a measurement of the down quark fractional polarization in the nucleon to test predictions of pQCD via experiment PR12-06-109. Dr.~Philip Cole is co-spokesperson on PR12-09-003, an experiment to study the excited state of the nucleon. Dr.~Mahbub Khandaker will conduct a high-precision measurement of the proton charge radius in experiment E12-11-106 to resolve a current discrepancy between the proton radius extracted from muonic and electronic hydrogen experiments. Dr~Dustin McNulty is continuing his work using parity violation to precisely measure the neutron skin of lead and calcium to test nuclear model predictions of the difference between the radii of protons and neutrons in a heavy nucleus. Two graduate students have recently obtained their PhDs, one will soon graduate, and three more are currently working on comprehensive measurements of vector meson and hyperon photoproduction employing linearly polarized photons to improve our understanding of the underlying symmetry of the quark degrees of freedom in the nucleon, the nature of the parity exchange between the incident photon and the target nucleon, and the mechanism of associated strangeness production in electromagnetic reactions.

Broader Impacts

\begin{center} {\it \underline {Broader Impacts of the Proposed Activities}} \end{center}

In addition to the scientific program described here, this proposal represents a major effort in the area of educating future scientists. The present shortage of graduate students in experimental and theoretical nuclear physics is having a detrimental impact on our national laboratories and facilities which posses a plethora of data but limited manpower for analyzing and disseminating the information. The Idaho State University Department of Physics is comprised of nine tenure-track faculty, all of whom have research interests which are in some way connected to nuclear physics and are in a position to directly address the shortage of graduate students. With its on campus accelerator and detector laboratories, the Department focuses on experimental and applied physics, giving students a strong hands-on educational experience. ISU's physics program is relatively new and is rapidly growing.


The PIs are further strengthening the ISU graduate program by recruiting high-caliber students from Latin America. Latin America remains an underutilized intellectual resource. The ISU Group has strong ties to Colombia and has attracted four talented graduate students into nuclear physics at ISU; three are working on JLab-related projects and one graduated in late 2009 and is now an Assistant Professor in Bogot\'{a}, Colombia. The activities delineated within this proposal will provide another avenue through which the program can continue to solidify this mutually beneficial bridge of collaboration among countries in the Americas.

Project Description

Introduction

We propose to perform measurements using electromagnetic probes at Jefferson Lab that will enhance our fundamental understanding of nucleons and nuclei. The experiments within this proposal perform measurements of a nucleon's constituents, the size of the proton, and the surface of a nucleus.

CLAS Polarized Structure Function

NSF_2012_CLAS_PSF

Projects Table

Project Personnel Status pgs
[math] \frac{\Delta d}{d}[/math] Polarization Forest Approved 2
N* Cole Approved 3
[math]G_E^p(Q^2=0)[/math] Khandaker , McNulty Approved 2
PV (nucleus size, weak mixing angle, astro physics) McNulty Cond. Approved 3



File:09142012 A SDME.pdf

File:09142012 B Ks.pdf

File:09142012 C slide3.pdf



Budget Justification Table

3 year Costs Description
500 Ar/Co2 detector gases, LN2 coolant for target tests
4500 VME based module
5000 NIM bin electronics
15000 PMTs and bases
9000 raw construction materials for R & D tests
6000
20000


Stuff

5 students

Section on training our JLab students in Hardware


Student do physics at JLab and gain experience with hardware using ISU facilities.

CLAS can also be categorized as a bunch of "One off" experiments. Perhaps review publication record of the experiments. PV experiments take 10 years from construction to publication some CLAS experiments took less.



NSF

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