VACUUM SYSTEM OF GAS JET BEAM PROFILE MONITOR

VACUUM SYSTEM OF GAS JET BEAM PROFILE MONITOR HAO ZHANG

Overview Setup hao. zhang@cockcroft. ac. uk Gas Jet meeting 28/06/2016

Vacuum hao. zhang@cockcroft. ac. uk Gas Jet meeting 28/06/2016

Mechanic drawing ① ③ ② ④ ⑤ ③ ⑥ ① ④ ① ③ Differential gauge ② ③ ② ⑤ ④ ④ ④ hao. zhang@cockcroft. ac. uk Gas Jet meeting 28/06/2016

Pump Scroll Pump Number Brand Type Pumping Speed 1 Scroll. VAC SC 5 D 5 m 3/h 2 Scroll. VAC SD 30 m 3/h 3 Scroll. VAC SD 15 m 3/h 4 Scroll. VAC SD 15 m 3/h Brand Type Pumping Speed* 1 Pfeiffer TMU 200 MP 180 L/s 2 Leybold SL 300 270 L/s 3 Pfeiffer Hipace 80 67 L/s 4 Leybold SL 700 690 L/s 5 Pfeiffer Hipace 80 67 L/s 6 Leybold SL 300 270 L/s Turbo Pump hao. zhang@cockcroft. ac. uk Gas Jet meeting 28/06/2016 *based on N 2 gas.

Gauge Pirani Gauge Number Brand Type 1 Laybold Thermovac TTR 91 DN 16 KF Min pressure 5*10 -4 mbar Ion Gauge Number Brand Type Min pressure 2 Laybold Ionivac Sensor IE 514 2*10 -12 mbar 3 Laybold Ionivac Sensor IE 514 2*10 -12 mbar 4 Pfeiffer PBR 260 5*10 -10 mbar 5 Pfeiffer PBR 260 5*10 -10 mbar 6 Laybold Ionivac Sensor IE 514 2*10 -12 mbar hao. zhang@cockcroft. ac. uk Gas Jet meeting 28/06/2016

Pressure Number 1 2 3 4 6 Jet off (mbar) <5. 0*10 -4 2. 1*10 -6 9. 7*10 -8 1. 8*10 -8 5. 36*10 -10 Jet on (mbar) 1. 19*10 -3 6. 9*10 -5 4. 8*10 -6 2. 3*10 -8 1. 21*10 -9 hao. zhang@cockcroft. ac. uk Gas Jet meeting 28/06/2016

2 D Jet Scan at dumping chamber 1 Edge scan Decrease the scanning step size 5. 75 mm 20 mm The scanning step size is 0. 125 mm*0. 25 mm. Each horizontal line will be a error function. Do a differential about the horizontal line will get the distribution. Differentiate 5. 5 mm resolution is enough for vertical scan and the vertical size presented here is close to the jet vertical size. But horizontally, since the slit is too wide, so the distribution here is a integration of the jet density in the slit. So for the horizontal scan, we will only get the slit size. The 45 degree angle is well presented. Only both the edges are presenting the jet distribution. We don’t have enough resolution there because the step size is 0. 5 mm 5. 75 mm 12. 5 The scanning step size is 0. 5 mm. mm Since the slit is 10 mm * 0. 5 mm, so the 5. 5 hao. zhang@cockcroft. ac. uk mm Gas Jet meeting 28/06/2016 Jet thickness = 1. 2 mm Jet length = 6. 2 mm