Tritium Runplan 2017/18. Florian Hauenstein Old Dominion University Hall A collaboration meeting

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1 Tritium Runplan 2017/18 Florian Hauenstein Old Dominion University Hall A collaboration meeting

2 Tritium Experiments E (MARATHON) Deep Inelastic Scattering to measure F 2n to F 2p ratio, u/d ratio and EMC in A = 3 E (x B > 1) 2N and 3N Short-Range-Correlations, Quasielastic scattering for Q 2 up to 3 GeV 2 E (e p) Proton and neutron momentum distributions in A = 3 asymmetric nuclei E (elastic) Electric form factor ratio of 3 He and 3 H and charge radii extraction Florian Hauenstein, HallA collaboration meeting 2

3 2017/18 Beam Schedule 2017 (Nov 16) Feb 2017 June 2017 Summer break Oct 2017 E (Marathon) E (elastic) E (x B > 1) 12 weeks 0.5 weeks 5 ½ weeks End 2017 Dec 2017 E (e p) 3 ½ weeks Florian Hauenstein, HallA collaboration meeting 3

4 Beam Schedule 2017/18 Oct 2017 E (Marathon) 10 weeks Dec 2017 Feb 2018 March/April 2018 E (x B > 1) E (e p) nodetailed schedule available 5 ½ weeks 3 ½ weeks End Spring runtime E (elastic) 0.5 weeks Florian Hauenstein, HallA collaboration meeting 4

5 E Measurement: Settings E beam : 11 GeV (main production), 8.8 GeV, 6.6 GeV and 4.4 GeV I b = 25 μa LHRS and RHRS are set for e - 3 He, 3 H and 2 H targets 42 PAC days in total 36.5 PAC days for production 5.5 PAC days for positron running, angle changes etc Florian Hauenstein, HallA collaboration meeting 5

6 E : Kinematic Settings Table 9: 2 H, 3 H and 3 He Cross Section and Rates for d/u Extraction with only one HRS and optimized kinematic settings. F1F2IN09 model is used to get a cross check with the F2ALLM97 model. A W 2 > 4cutisappliedwhen calculating the rate (W 2 > 3whenx>0.70). 15cm Target Length is used and 10% reduction with SOS is applied. 20% RC e ect and 20% total e ciencies are considered. From J. Arrington and Z. Ye x bj W 2 Q 2 E 0 H2 H3 He3 H2 Rate H3 Rate He3 Rate Total (x avg bj ) (W avg) 2 (nb/s (nb/sr (nb/sr &Hour &Hour &Hour Hour (GeV 2 ) (GeV 2 ) (GeV) (Deg) /GeV) /GeV) /GeV) Hz(Hour) Hz(Hour) Hz(Hour) HRS 0.87(0.83) 3.06(3.67) (0.00) 0.000(0.00) 0.003( ) HRS 0.83(0.78) 3.11(3.79) (48.15) 0.085(81.83) 0.149(46.46) HRS 0.79(0.76) 3.64(4.02) (26.44) 0.156(44.63) 0.272(25.55) HRS 0.75(0.74) 4.16(4.32) (15.66) 0.264(26.34) 0.458(15.17) HRS 0.71(0.71) 4.69(4.69) (9.92) 0.417(16.64) 0.725(9.57) HRS 0.67(0.67) 5.22(5.18) (6.50) 0.637(10.90) 1.110(6.26) HRS 0.63(0.63) 5.74(5.70) (4.37) 0.947(7.33) 1.656(4.19) HRS 0.59(0.59) 6.27(6.23) (2.97) 1.393(4.98) 2.439(2.85) HRS 0.55(0.55) 6.79(6.75) (2.05) 2.021(3.44) 3.533(1.97) 7.45 HRS 0.51(0.51) 7.32(7.27) (1.43) 2.899(2.40) 5.045(1.38) 5.20 HRS 0.47(0.47) 7.84(7.80) (1.00) 4.165(1.67) 7.184(0.97) 3.64 HRS 0.43(0.43) 8.37(8.33) (0.71) 5.944(1.17) (0.69) 2.56 HRS 0.39(0.39) 8.89(8.85) (0.50) 8.469(0.82) (0.49) 1.81 HRS 0.35(0.35) 9.42(9.38) (0.35) (0.57) (0.35) 1.27 HRS 0.31(0.31) 9.94(9.90) (0.25) (0.40) (0.25) 0.89 HRS 0.27(0.27) 10.47(10.43) (0.17) (0.28) (0.17) 0.62 HRS 0.23(0.23) 10.99(10.95) (0.12) (0.19) (0.12) 0.42 Total Days 124 (19) Florian Hauenstein, HallA collaboration meeting 6

7 E : Projected Results Florian Hauenstein, HallA collaboration meeting 7

8 E : Further Remarks Investigation of changes in the kinematic settings due to E beam = 2.1 GeV per pass Measurement scheduled in October December 17 Availability of 25 μa beam Maximum momentum of the spectrometer Difference in beam time to previous beam schedule for the highest beam energy (10.6 GeV) Florian Hauenstein, HallA collaboration meeting 8

9 E Measurement: Settings E beam : 4.4 GeV (main production) and 2.2 GeV (check & quasielastic) I b = 25 μa LHRS and RHRS are set for e - RHRS measurement parasitic at 4.4 GeV 3 He, 3 H and 2 H targets 19 PAC days for both beam energies 17.5 PAC days at 4.4 GeV including time for calibration etc. 1.5 PAC days at 2.2 GeV including time for calibration etc Florian Hauenstein, HallA collaboration meeting 9 9

10 E : Kinematic Coverage Right HRS running at 4.4 GeV (parasitic) Extends worlds 3 H QE data to Q 2 = 3 GeV QE 28.5 o 26.5 o 24.5 o 2N 3N Left HRS Right HRS ("parasitic") Left & Right HRS Left HRS running at 4.4 GeV ( 400 hours) LHRS and RHRS running at 2.2 GeV ( 24 hours) Q 2 (GeV 2 ) o 30.3 o } 26.2 o E = 2.2 GeV 22.0 o 17.0 o x Florian Hauenstein, HallA collaboration meeting 10

11 E : Projected Statistic T=0 dominance isospin independence 17.0 o (1.48<Q 2 <1.58) 19.0 o (1.75<Q 2 <1.88) He/ 3 H x FIG. 2: projected statistical precision. Yellow band shows the systematic error. 3 H/ 3 He GeV, 17 o 4.4 GeV, 19 o 4.4 GeV, 24.5 o 4.4 GeV, 26.5 o 4.4 GeV, 28.5 o 2.2 GeV, 22 o 2.2 GeV, 26.2 o 2.2 GeV, 30.3 o x Uncertainties for the measurements in the QE region Florian Hauenstein, HallA collaboration meeting 11

12 E : Further Remarks Investigation of changes in the kinematic settings due to E beam = 2.1 GeV per pass 2 days overhead time for calibration and change of settings Availability of 25 μa beam Measurement in February/March Florian Hauenstein, HallA collaboration meeting 12

13 E Measurement: Settings <p m > (MeV/c) x E e (GeV) θ e p p θ p Time 3 H+ 3 He (PAC days) o o o o 10 fast slow E b = 4.4 GeV I beam = 20 μa Q 2 2 GeV 2 x = Q 2 /2mω> 1 (quasi-elastic) θ nq < 40º LHRS for e - and RHRS for protons Low luminosity L ( 3 H) = nucleons cm -2 s -1 1 PAC day for calibration Total 24 days (12 PAC days) run time Florian Hauenstein, HallA collaboration meeting 13

14 Suppression of other Reaction Processes 3 He( e, e' p) R = σ Full / σ PWIA 500 MeV/c 400 MeV/c Rescattering minimized at small angles (verified for deuterium). Small angles => x B >1 => suppress MEC and IC effects. 200 MeV/c 3 He 3 H e,e' p ( ) PWIA Calculation Q 2 = 2 GeV 2 θ nq = 30º Rescattering effects cancel in the 3 He/ 3 H ratio Full Calculation Florian Hauenstein, HallA collaboration meeting 14

preliminary 3 H 3 He Plots from Rey Torres 18.

15 Simulation Results for P miss Spectra E beam = 4.4 GeV, cut on Θ rq < 40 o preliminary preliminary 3 H 3 He Plots from Rey Torres Florian Hauenstein, HallA collaboration meeting 15

He For high P miss nearly same statistic for both

16 Simulation Results for P miss Spectra (2) E beam = 4.4 GeV, cut on Θ rq < 40 o preliminary 3 H preliminary 3 He For high P miss nearly same statistic for both targets Florian Hauenstein, HallA collaboration meeting 16

17 3 He and 3 H reduced crosssections; Compared to calculations. E : Projected Results Proton/neutron momentum ratio Kinetic Energy Sharing; Mapping of Inversion Florian Hauenstein, HallA collaboration meeting 17

18 E : Further Remarks Investigation of the kinematic settings for E beam = 4.2 GeV Possible test of trigger and HRS setup with Ar(e,e p) run in Spring 2017 Measurement shifted to March/April Florian Hauenstein, HallA collaboration meeting 18

E12-14-009 Measurement: Settings E beam = 1.1 GeV I b = 5 μa Q 2 = 0.05 0.09 GeV 2 Use only LHRS (at 12.

19 E Measurement: Settings E beam = 1.1 GeV I b = 5 μa Q 2 = GeV 2 Use only LHRS (at 12.5 o and 15 o ) LHRS setto electrons 3 He, 3 H Special collimator plate 1.5 PAC days (0.75 for production) collimator plate Florian Hauenstein, HallA collaboration meeting 19

E12-14-009: Kinematics and Uncertainties Table 4 Sources of uncertainty in the 3 H: 3 He radius ratio. Statistics 0.4% Charge <0.5% Relative target thickness 1.

20 E : Kinematics and Uncertainties Table 4 Sources of uncertainty in the 3 H: 3 He radius ratio. Statistics 0.4% Charge <0.5% Relative target thickness 1.5 2% Dead time, tracking, detector efficiency corrections <0.5% G M subtraction 0.4% Radiative corrections 0.5% Coulomb correction, TPE 0.4% Total % Florian Hauenstein, HallA collaboration meeting 20

21 Summary and Outlook MARATHON experiment scheduled for this year Other experiments expected to be performed in Spring 2018 Tritium run in FY 18 Available weeks for experiments #weeks FY 18 Number of weeks probably decrease if only 3 hall operation Lower beam energy per pass has to be considered Details about the run plan would be on wiki page soon ( Florian Hauenstein, HallA collaboration meeting 21

22 Beam Schedule 2017/18 Oct 2017 Dec 2017 Feb 2018 March/April 2018 E (Marathon) E (x B > 1) E (e p) 10 weeks + 2 weeks in 18? nodetailed schedule available 5 ½ weeks 3 ½ weeks End Spring runtime E (elastic) 0.5 weeks Florian Hauenstein, HallA collaboration meeting 22

23 Backup Slides Florian Hauenstein, HallA collaboration meeting 23

24 E : Kinematics for Lower Momentum Setting Table 10: 2 H, 3 H and 3 He Cross Section and Rates for d/u Extraction with optimized kinematic settings using R-HRS at a lower momentum. F2ALLM97 model is used. A W 2 > 4cutisappliedwhencalculatingtherate(W 2 > 3when x>0.70). 15cm Target Length is used and 10% reduction with SOS is applied. 20% RC e ect and 20% total e ciencies are considered. x bj W 2 Q 2 E 0 H2 H3 He3 H2 Rate H3 Rate He3 Rate Total (x avg bj ) (W avg) 2 (nb/s (nb/sr (nb/sr &Hour &Hour &Hour Hour (GeV 2 ) (GeV 2 ) (GeV) (Deg) /GeV) /GeV) /GeV) Hz(Hour) Hz(Hour) Hz(Hour) HRS 0.87(0.83) 3.06(3.67) ( ) 0.003( ) 0.006( ) HRS 0.83(0.80) 3.40(3.87) (155.35) 0.024(287.74) 0.049(141.21) HRS 0.79(0.78) 3.99(4.19) (81.73) 0.046(150.03) 0.093(74.76) HRS 0.75(0.75) 4.59(4.61) (47.19) 0.081(85.80) 0.160(43.47) HRS 0.71(0.71) 5.18(5.15) (29.08) 0.133(52.35) 0.257(26.98) HRS 0.67(0.67) 5.77(5.74) (18.56) 0.210(33.08) 0.400(17.35) HRS 0.63(0.63) 6.37(6.34) (12.12) 0.325(21.39) 0.608(11.41) HRS 0.59(0.59) 6.96(6.93) (8.12) 0.489(14.19) 0.902(7.70) HRS 0.55(0.55) 7.55(7.52) (5.52) 0.726(9.56) 1.317(5.27) HRS 0.51(0.51) 8.14(8.12) (3.80) 1.064(6.53) 1.898(3.66) HRS 0.47(0.47) 8.74(8.70) (2.66) 1.536(4.52) 2.697(2.57) 9.75 HRS 0.43(0.43) 9.33(9.30) (1.85) 2.219(3.13) 3.837(1.81) 6.79 HRS 0.39(0.39) 9.92(9.89) (1.29) 3.206(2.17) 5.457(1.27) 4.73 HRS 0.35(0.35) 10.52(10.49) (0.90) 4.639(1.50) 7.775(0.89) 3.29 HRS 0.31(0.31) 11.11(11.08) (0.62) 6.772(1.03) (0.62) 2.27 HRS 0.27(0.27) 11.70(11.67) (0.42) (0.69) (0.43) 1.54 HRS 0.23(0.23) 12.30(12.26) (0.28) (0.45) (0.28) (57) Florian Hauenstein, HallA collaboration meeting 24

25 E : Kinematic Table (LHRS) kin# E θ E x range Q 2 range Tg I psc R tot R phys time Total (GeV) (deg) (GeV) (GeV/c) 2 (µa) (Hz) (Hz) (hrs) (hrs) He H H He H He H H He H H He H H He H H He H H Total time needed hours ( 19 days) 4.4 GeV 22h = 2.2 GeV Florian Hauenstein, HallA collaboration meeting 25

E12-11-112: Kinematic Table (RHRS) From proposal 380h @ 4.

26 E : Kinematic Table (RHRS) From proposal 4.4 GeV 2.2 GeV Florian Hauenstein, HallA collaboration meeting 26

27 E : Simulation 3 H Results ] 2 /c 2 [GeV 2 Q ] 2 /c 2 [GeV 2 Q P [MeV/c] miss θ rq [degree] Florian Hauenstein, HallA collaboration meeting 27

28 E : Detailed Beam Time Request Table 5 Allotment of proposed beam time. Description Accelerator scaling to 1.1 GeV BCM calibration and luminosity scans Optics and acceptance studies with collimator Production running at 12.5 (1.5 hrs/target) Time 4 hr 2hr 4hr 9hr Target changes at hr 1 Movement of spectrometer from 12.5 to hr Optics and acceptance studies with collimator Production running at 15.0 (1.5 hrs/target) 4hr 9hr Target changes at hr Total Beam Time Request 1.5 PAC Days 1 Movement of the spectrometer will require a special access due to Florian Hauenstein, HallA collaboration meeting 28

E : Ratio of the electric form factor in the mirror nuclei 3 He and 3 H (The 3 He 3 H Charge Radius Difference)

E : Ratio of the electric form factor in the mirror nuclei 3 He and 3 H (The 3 He 3 H Charge Radius Difference) E12 14 009: Ratio of the electric form factor in the mirror nuclei 3 He and 3 H (The 3 He 3 H Charge Radius Difference) Luke Myers Hall A Winter Meeting December 9, 2014 Measuring r 2 Absolute methods