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Space charge accumulation and conduction current in low density polyethylene (LDPE) incuding cumylalcohol under dc high electric field were investigated using improve PEA (pulsed electro-acoustic) measurement system. In the bulk of XLPE that is being used for power transmission cables, there remain some chemical residues of crosslinking by-products such as α-methylstyrene, acetophenone and cumylalcohol...
We have investigated the space charge distribution in low density polyethylene (LDPE). Under high dc electric field, a huge amount of positive packet like charge is observed in LDPE. It moves towards the counter electrode under high dc electric field, and then the breakdown finally occurs. The reason of the generation of the packet like charge is thought that there are two different conductivity in...
Space charge distribution and external current in low density polyethylene (LDPE) have been measured simultaneously using an improved PEA (pulsed electro-acoustic) measurement system. They are usually measured using different devices independently. However, to investigate the relationship between the space charge behavior and the conduction current, it is necessary to measure them simultaneously in...
Orbits of charged particles, especially secondary electrons, in a magnetic field of cusp configuration were studied for the purpose of development of direct energy conversion for advanced fusion where separation of electrons and ions was significant. For analytical estimation, the Stormer potential was calculated, showing that ions could move wide region of magnetic field although electrons just aligned...
The DSC curve, the DC current and the space charge distribution have been measured on polypropylene (H-PP), block copolymer (B-PP) and random copolymer (Z-PP) copolymerized with Ziegler catalyst, and M-PP copolymerized with metallocene catalyst. The copolymers have 3.0~4.5 wt% of ethylene. B-PP with 4.5 wt% of ethylene had similar DSC curve and space charge distribution to H-PP. The magnitude of DC...
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