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None Re: low energy limit for electron to accelerate in electric field 

Forum: Fields: Magnetic and Otherwise
Re: None low energy limit for electron to accelerate in electric field (elnaz yazd)
Re: None Re: low energy limit for electron to accelerate in electric field (Tom Roberts)
Date: 22 Jan, 2018
From: elnaz yazd <elnaz yazd>

Thank You a lot for your kindly answer to my question. the energy of primary particle is 3 eV and it is propagating in combined electric and magnetic field inside very low pressure gas (nitrogen vacuum). The positron is emitted from z=-1cm. The result of tracking of 1 event is as follows:

Step# Z KineE dEStep StepLeng TrakLeng Volume Process

0 -1 cm 3 eV 0 eV 0 fm 0 fm holeCollimator initStep

1 0 fm 300 eV 3 eV 1 cm 1 cm holeCollimator Transportation

2 30 cm 190 eV 9.97 eV 30.4 cm 31.4cm Cylander1 Transportation

3 60 cm 88.6 eV 1.38 eV 30.2 cm 61.6 cm Cylander2 Transportation

4 60 cm 0 eV 88.6 eV 55.3 cm 1.17 m Cylander3 Transportation

5 60 cm 0 eV 0 eV 0 fm 1.17 m Cylander3 annihil

The field in holeCollimator volume is 300 V/cm and electric field is 11 volt/cm in the three 30 cm length cylinders volume. As you can see the e+ tracking is started from initial step in holeCollimator with 3 eV energy and the energy gains 300 eV by first field and 3 eV energy is deposited in first step by process of transportation. The particle goes ahead in fields of cylinders loss energy by Transportation process. The final energy of e+ isn't equal with the difference of acceleration and deceleration fields. Would you please tell me the reason for loss of energy in dEStep by Transportation process. With best regards, Yazdan

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