1. Target Analysis for Transversity
Yi Qiang
Jan. 29, 2009
for Transversity Analysis Meeting
Transversity Analysis Meeting
6/17/2019

2. Transversity Analysis Meeting
Outline
Goal of the target analysis
Measurements/data obtained so far
Procedures for major analysis
List of analysis
6/17/2019
Transversity Analysis Meeting

3. Goals of target analysis
Target polarization: 3%
Target polarization direction: 0.2 degrees
Target density/Luminosity calculation: 2%
Target cell wall thickness: 10%
Nitrogen dilution factor: 10%
* 3He elastic scattering asymmetry
6/17/2019
Transversity Analysis Meeting

4. Transversity Analysis Meeting
Data obtained so far
Basic characteristics of all three production cells
Geometry, Volume and 3He density (N2 density from UVa cells)
Holding field direction
Compass measurements
Coil currents in each event
RTD readings in each event: pumping, target and reference cells
NMR frequency sweeps in each spin flip (every 20min)
EPR/NMR cross calibration: at least 2 for each config
Pumping chamber internal temperature test: at least 1 for each config
NMR freq/field cross calibration: at least 1 for each config
Water measurement: 3 sets of data
Distance of pickup coil to cell
Some spin up and AFP loss data
6/17/2019
Transversity Analysis Meeting

5. Holding Field Calibration
Field Direction Determination:
Used vertical compass aligned Vertical field direction before the experiment ( ~ 0.1 degrees )
Horizontal Compass survey with constant holding field current settings: 8 combinations ensure enough parameters for a fairly realistic field formula ( early analysis already shows an 0.2 degrees accuracy with 6 parameters)
Field Strength Determination:
EPR frequency
NMR
6/17/2019
Transversity Analysis Meeting

6. EPR/NMR analysis EPR Analysis Polarization!
Internal Temperature Measurement
Internal Temperature Calibration
Target Density Measurement
RTD readings
Density at Pumping Chamber
Target Cell Geometry
EPR Data: EPR frequency shift and NMR during each flip
EPR Analysis
Polarization at pumping chamber
NMR frequency sweep calibration constant
NMR Frequency Sweep Data including Temperature
Polarization!
6/17/2019
Transversity Analysis Meeting

7. Water analysis Water Analysis Polarization!
Pickup Coil Distance
Flux Calculation
Target Density Measurement
Density at Target Chamber
Cell Geometry
Water NMR Field Sweep Data
Water Analysis
Polarization at Target Chamber
NMR Field Sweep Calibration Constant
RTD readings
Data Filter
Holding Field Current
Magnetic Field Strength
NMR Field/Frequency Cross Calibration
NMR Frequency Sweep Calibration Constant
NMR Frequency Sweep Data including Temperature
Polarization!
6/17/2019
Transversity Analysis Meeting

8. Dilution Factor Dilution Factors In-Elastic Yield of 3He, H2 and N2
Elastic Pressure Curve
In-Elastic Data from Reference Cell, RTD Readings
Density of 3He and N2
Elastic Data of Reference Cell with Different Pressure
RTD Readings
Production Data with RTD Readings
Dilution Factors
Production Cell Elastic Data
Filling Density
Compare
In-Elastic Yield of 3He, H2 and N2
Calibrated Pressure Readings
6/17/2019
Transversity Analysis Meeting

9. Transversity Analysis Meeting
List of Works
Analysis
Holding Field Modeling
EPR
Internal Temperature Calibration (Chiranjib)
EPR Analysis (Chiranjib/Jin)
Water
Flux Calculation (Yi’)
Water Analysis/Data Filtering
Dilution Factor
Measurement
Density Measurement (Yi’)
Wall Thickness Measurement (Yi’)
6/17/2019
Transversity Analysis Meeting