RF Diagnostic Dump Beam Parameters Analysis Summary
Investigating beam parameters for LEREC RF Diagnostic Dump with a focus on the beam shape, power, heat transfer coefficient, material properties, temperature distribution, thermal stress, and results for 2.0 MeV beams. Detailed analysis includes heat generation, water pressure, beam profiles, and stress calculations. Images provide a visual representation of the data.
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Presentation Transcript
LEREC RF Diagnostic Dump Beam Parameters Vertical Deflecting Cavity is always on thru MPS The beam shape is shown in figure on the right* The power is 110 kW, a DC beam is used for simplicity The delay between the trains can be as long as needed. Some typical numbers are: For 250 s long trains the delay is ~5 s For 500 s long trains the delay is ~17 s For 1 ms long trains the delay is ~60 s. ANALYSIS SUMMARY Only the 250 s was investigated for 2.0 MeV, 1.6 MeV and 2.6 MeV beams. Gaussian profile was used. The material was Ti alloy with the surface tilted at 20 to the Z axis, the thickness is 2mm and a pressure on the backside or 35 psi to simulate the cooling water. J. Hock 10/18/16
LEREC RF Diagnostic Dump Power= 110KW for 250 s ENERGY PER PULSE, 27.5J Flow= 5gpm T~ 0 C Calculated Heat Transfer Coefficient: hC= 9,000W/m2 C Water Pressure @ 35 psi P= 3psi J. Hock 9/21/16
LEREC RF Diagnostic Dump The beam profile was simplified to an ellipse .8mm by 30mm as shown below: 2.0 MeV beam profile 20 15 10 5 0 0 2000 4000 -5 -10 -15 -20 Heat Generation W/mm2 3000 2000 1000 0 -20 -10 0 10 20 J. Hock 10/18/16
LEREC RF Diagnostic Dump Results For 2.0 MeV, Temperature : 250us 2 MeV 110 kW per Cool down time Data for 20 beam incident Ti alloy gr6 g/mm3 density(ti alloy gr6) heat capacity(Ti alloy gr6) d1= d2= t= vol= mass= E T(ofc) E= heat generation= 0.00448 0.53 j/g C 30mm 2.33904352mm 1.103923496mm 60.83988931mm3 0.272562704g 2.75E+01j 190.3664429 C 1.10E+05W 1.81E+03W/mm3 Max Temperature J. Hock 10/18/16
LEREC RF Diagnostic Dump Results For 2.0 MeV, Thermal Stress: 250us 2 MeV 110 kW per Material: Ti Alloy Grade 6 Yield Strength 827MPa Ultimate 861MPa SF=2.2* *Safety Factor is based on the yield strength @ 300 C. J. Hock 10/18/16
LEREC RF Diagnostic Dump The beam profile was simplified to an ellipse .8mm by 30mm as shown below: 1.6 MeV beam profile 20 15 10 5 0 0 2000 4000 -5 -10 -15 -20 Heat Generation W/mm2 4000 2000 0 -20 -10 0 10 20 J. Hock 10/18/16
LEREC RF Diagnostic Dump Results For Temperature : 250us 1.6 MeV 110 kW Cool down time Data for 20 beam incident Ti alloy gr6 g/mm3 density(ti alloy gr6) heat capacity(Ti alloy gr6) d1= d2= t= vol= mass= E T(ofc) E= heat generation= 0.00448 0.53 j/g C 30mm 2.33904352mm 0.831842947mm 45.84487332mm3 0.205385032g 2.75E+01j 252.6318098 C 1.10E+05W 2.40E+03W/mm3 Max Temperature J. Hock 10/18/16
LEREC RF Diagnostic Dump Results For 1.6 MeV, Thermal Stress: 250us 1.6 MeV 110 kW per Material: Ti Alloy Grade 6 Yield Strength 827MPa Ultimate 861MPa SF=1.6* *Safety Factor is based on the yield strength @ 380 C. J. Hock 10/18/16
LEREC RF Diagnostic Dump The beam profile was simplified to an ellipse 1.5mm by 25mm as shown below: 2.6 MeV beam profile 20 15 10 5 0 0 1250 2500 -5 -10 -15 -20 Heat Generation W/mm2 2500 1500 500 -500 -10 -5 0 5 10 J. Hock 10/18/16
LEREC RF Diagnostic Dump Results For Temperature : 250us 2.6 MeV 110 kW Cool down time Data for 20 beam incident Ti alloy gr6 g/mm3 j/g C 25mm density(ti alloy gr6) heat capacity(Ti alloy gr6) d1= d2= t= vol= mass= E T(ofc) E= heat generation= 0.00448 0.53 4.3857066mm 1.560156863mm 134.3500185mm3 0.601888083g 2.75E+01j 86.20671175 C 1.10E+05W 8.19E+02W/mm3 Max Temperature J. Hock 10/18/16
LEREC RF Diagnostic Dump Results For 2.0 MeV, Thermal Stress: 250us 2.6 MeV 110 kW per Material: Ti Alloy Grade 6 Yield Strength 827MPa Ultimate 861MPa SF=2.9* *Safety Factor is based on the yield strength @ 260 C. J. Hock 10/18/16
