1 Optical Diagnostic Results of Hg Jet Target and Post-Simulation H. Park, H. Kirk, K. McDonald Brookhaven National Laboratory Princeton University Stonybrook.

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Presentation transcript:

1 Optical Diagnostic Results of Hg Jet Target and Post-Simulation H. Park, H. Kirk, K. McDonald Brookhaven National Laboratory Princeton University Stonybrook University November 6, nd Oxford-Princeton High Power Target Workshop Princeton University, NJ

2 Talk Outline & Introduction ● Introduction : Aim of work - Understand the optical diagnostic results from experiment - Post-simulate with the experimentally observed results - Learn the characteristics of high power Hg target through the comparison of numerical calculation of theory with experimental results ● Experimental Results - Hg jet behavior in parallel B field: Jet height, Surface stabilization, Jet trajectory - Extent of jet disruption with beam intensity and beam energy - Response of filamentation on jet surface in crossing B field ● Post-Simulation Status - Beam spot size from optics (I. Efthymiopoulos, CERN) - Distribution of energy deopsition to Hg target (S. Striganov, FNAL) ● Future Work - Beam interacting MHD simulation (R. Samulyak, SBU) - Compare with experimental results and make discussion

3 Mercury Intense Target Experiment : October 22, 2007 ~ November 11, 2007 Installation of key components for MERIT experiment Beam axis Magnet axis Mercury Jet Nozzle Viewport 1 30cm Viewport 2 45cm Viewport 3 60cm Viewport 4 90cm 67 milliradian At 45 cm, milliradian, At 0 cm, 34 milliradian At 45cm, mm

4 Influence of Magnetic Field and Gravity to Jet Trajectory At 45 cm, beam is steered to hit the center of Hg jet Magnet Axis & Direction Beam axis & Direction 67 milliradian At nozzle x=0, 34 milliradian At nozzle x=0, 33 milliradian At 45 cm, milliradian At 45 cm, milliradian

5 Longitudinal Hg Jet Stream Velocity along Distance from Nozzle Boundary layer induced by a jet emerging from a nozzle

6 Hg Jet Height vs. Magnetic Field and Distance from Nozzle Jet distortion vp1 vp2 vp3 (R. Samulyak, 2008)

7 Beam Pulse Structure and Beam Size from Optics and Camera (G. Skoro, 2008) (I. Efthymiopoulos, 2008) (G. Skoro, 2008)

8 Beam Size from Camera Monitor As a Function of Measured Time (G. Skoro, 2008)

9 Investigation of Hg Jet Interacting with 24GeV 10Tp Beam in 10T Field

10 Velocity Distribution at Hg Jet Surface

11 Time Response of Velocity at Hg Jet Surface

12 Energy Deposition to Hg Jet Target, Circular Curved Jet (S. Striganov, 2008) radius=0.795 cm, density = 5.32g/cm^3 Max. energy deposition = GeV/g/proton (92.8 z=9cm, r=-0.159cm, phi=315 degree. Total energy deposition = 1.13 GeV/proton 10 Tp)

13 radius_vert=0.795 cm, radius_horiz=0.315cm, density = 13.54g/cm^3 Energy Deposition to Hg Jet Target, Elliptical Curved Jet Max. energy deposition = z=19cm ( Tp), r=0.557cm, phi=263.6 degree. Total energy deposition = 2.18 GeV/proton ( Tp) (S. Striganov, 2008)

14 Energy Deposition to Hg Jet Target, Circular Straight Jet radius=0.795 cm, density = 5.32g/cm^3 Max. energy deposition = z=3cm ( Tp), r=-0.159cm, phi=285 degree. Total energy deposition = 1.07 GeV/proton ( Tp) (S. Striganov, 2008)

15 Energy Deposition to Hg Jet Target, Elliptical Straight Jet radius_vert=0.795 cm, radius_horiz=0.315cm, density = 13.54g/cm^3 Max. energy deposition = z=15cm (72 10 Tp), r=0.557cm, phi=263.6 degree. Total energy deposition = 2.37 GeV/proton ( Tp) (S. Striganov, 2008)

16 Extent of Disruption Length of Hg Jet Target Circular Curved Jet Elliptical Curved Jet Elliptical Straight Jet Circular Straight Jet Max. energy deposition = GeV/g/proton (92.8 z=9cm, r=-0.159cm, phi=315 degree. Total energy deposition = 1.13 GeV/proton 10 Tp) Max. energy deposition = z=3cm ( Tp), r=-0.159cm, phi=285 degree. Total energy deposition = 1.07 GeV/proton ( Tp) Max. energy deposition = z=19cm ( Tp), r=0.557cm, phi=263.6 degree. Total energy deposition = 2.18 GeV/proton ( Tp) Max. energy deposition = z=15cm (72 10 Tp), r=0.557cm, phi=263.6 degree. Total energy deposition = 2.37 GeV/proton ( Tp)

17 Conclusions and Future Work 1. Hg jet behavior in B Field was investigated experimentally. 2.Beam size and length was investigated but needs to interpret the difference of results between optics and camera monitor. 3. Based on the observed data, the calculation of energy deposition to Hg jet was calculated with elliptical jet and circular jet, which will be an input to the calculation of Hg jet response to the interaction of proton beam. 4.Filaments velocity of Hg jet in 10T field with an interaction of 10Tp beam needs to be simulated and compared with the measured value. 5.Jet model needs to be discussed and established based on the comparison between post-simlation results and exmerimental results.