1. Upgrade of the GlueX Spectrometer for Physics with Strange Final States
Nuclear Physics
Yi Qiang
Nov. 13, 2011

2. Executive Summary/Abstract
Physics Motivations
Ultimate goal of Hall-D GlueX program - study of QCD confinement in the gluonic degrees of freedom: need to search for complete nonets of hybrids mesons including states with 𝑠 𝑠 content.
Baryon spectroscopy of the strange sector: largely unmapped doubly-strange 𝛯 hyperons.
Short-range and gluonic structure of nucleons and nuclei: near threshold open-charm photo-production, complementary to Charmonium electro & photoproduction.
Goal: upgrade GlueX spectrometer with a new kaon identification system
GlueX-RICH: dual radiator Ring-Imaging Cherenkov detector.
Detector R&D.
Final design and construction.
Other benefits:
Collaborations between JLab and other national labs and universities.
New detector technology for future physics programs.

3. Specific Scientific Aims
Detector R&D and Prototyping
Characterization of detector components: Aerogel radiator, Micro-Channel Plate photodetector (MCP-PMT).
Development on the MCP-MPT readout: shape, photocathode & readout, collaborate with HEP division at Argonne National Lab.
Build a small scale prototype and carry out beam tests.
Design and Build the Full Detector
Preliminary to final design.
Electronics design and integration.
Early beam test with partially populated detector.
Final installation and commissioning.
Parallel tasks
Physics and detector simulations: aid the optimization of detector parameters and the design of final detector.

4. GlueX-RICH Detector Radiator: Aerogel (n=1.05) + C4F10
New US Option: aerogel developed by Aspen/ASU, already in SBIR phase II
Micro-Channel Plate photodetector (MCP-PMT) readout
Developed by Large-Aera Picosecond Photo Detector (LAPPD) collaboration: ANL, FNL, UChicago, UHawaii, UCB, Incom Inc. …, in third year
Good sensitivity to visible light
Good timing and position resolutions

5. Research Impact and Benefits
Jefferson Lab
Expand the physics reach of Hall-D
QCD confinement: complete picture of the hybrid meson families
𝛯 baryon spectroscopy, open-charm production …
New detector technology for other Halls: Hall-A SoLID, Hall-B CLAS12
Nuclear Physics (and other project offices if applicable)
Understand the QCD gluonic degree of freedom, answer
Gain detector experience for future programs: EIC …
Office of Science
Collaborate with other DOE labs on detector development: ANL …
Use the research achievements of DOE’s SBIR/STTR awards
Early career research program announcement

6. Resources Needed Salary: $914k Principal Investigator: 50% (30 months)
Mechanical and Electronic Engineers: 6(M.E.) + 5(E.E.) months
Designers and Technicians: 10(Designer) + 22(M.T.) + 15(E.T.) months
Postdoctoral Researcher: 30 months
Graduate students and other Postdocs: from collaboration institutes

7. Resources Needed Material Cost: $909k Travel: $21k
Capitalized: $735k
Material for testing and prototyping: $70k
Equipment and tooling: $104k
Travel: $21k
In-direct Cost: $727k
Total: $2,573k
Resources:
JLab: clean room, machine shop, electron beam
ANL: MCP-PMT samples, R&D facility, other support
MIT: Graduate students, Postdoc, MIT-Bates
UTFSM: testing facility for MCP-PMT, manpower
GlueX Collaboration: general support, manpower

8. Schedule and Milestones