Q5. The first ionization coefficient for a gas is approximately given by a = Ap eBp'E , where p ispressure in Torr and E

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Q5 The First Ionization Coefficient For A Gas Is Approximately Given By A Ap Ebp E Where P Ispressure In Torr And E 1 (60.88 KiB) Viewed 17 times

Q5. The first ionization coefficient for a gas is approximately given by a = Ap eBp'E , where p ispressure in Torr and E is electric field in V/cm. The breakdown voltage curve (Paschen Curve) of this gas is given as figure. Suppose that the second ionization coefficient for this gas is y=0.01. a) Find the constants A and B. b) Find the electrode separation d'ifp=50 mm.Hg and E=4 kV/cm U (V Us Meta 500 V → p.d (mm.Hg Cm) (p.d) cient = 1.25 Q6. The first ionization coefficient for a gas is approximately given by a = 16p e 300p, where p ispressure in mm.Hg and E is electric field in V/cm. Suppose that pressure is 600 Torr and the gap distance is d=4 cm. Fill the following table for different values of y. Ub (kV) Eb (kV/cm) (p.d)critical Ub.min (kV) Electron multiplication 0.002 82.488 20.622 1.0563 316.89x10 501 0.0001 86.377 21.5943 1.5648 469.44x10 10001 0.0004 84.714 21.1785 1.3286 398.58x10 2501