[FLASH-USERS] Laser focusing setting

[izumi-t+ile]

Dear flash-users,

There are two attachments.
In this simulation, a laser is inserted from the positive direction of the
vertical axis and focused at a radius of 1um at the origin.
In the Cartesian coordinate system, the laser is once focused at the origin
and then spreads in the negative direction.
However, in the cylindrical coordinate system, the laser is focused until
the spot diameter becomes zero and does not spread in the negative
direction.
Fig. 1 shows energy deposition (erg / s) when the target is placed at Z =
-2.0×10^(-3) (cm) on the vertical axis in the Cartesian coordinate system,
and Fig. 2 shows the case of cylindrical coordinates.
In the cylindrical coordinate system, it can be seen that the laser is not
hitting the target.
How should I set the laser to  spread in the negative direction in the
cylindrical coordinate system.

Best
Izumi
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泉智大
大阪大学レーザー科学研究所

レーザー宇宙物理学(LAE)グループ

博士課程前期2年(M2)

〒565-0871

大阪府吹田市山田丘2-6

Tel/Fax:(06)6879-8742

e-mail:izumi-t at ile.osaka-u.ac.jp <e-mail%3Aota-m at ile.osaka-u.ac.jp>
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