| Budget Amount *help |
¥48,100,000 (Direct Cost: ¥37,000,000、Indirect Cost: ¥11,100,000)
Fiscal Year 2014: ¥9,750,000 (Direct Cost: ¥7,500,000、Indirect Cost: ¥2,250,000)
Fiscal Year 2013: ¥11,830,000 (Direct Cost: ¥9,100,000、Indirect Cost: ¥2,730,000)
Fiscal Year 2012: ¥13,390,000 (Direct Cost: ¥10,300,000、Indirect Cost: ¥3,090,000)
Fiscal Year 2011: ¥13,130,000 (Direct Cost: ¥10,100,000、Indirect Cost: ¥3,030,000)
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| Outline of Final Research Achievements |
If the target atom to be polarized is in a beam, it is fairly easy to obtain high polarization efficiency by sending the laser pulse from the direction perpendicular to the atomic beam, because Doppler broadening can be neglected. However, for the case of atomic gas as a target, Doppler broadening is the main cause of low polarization and ionization efficiency. To overcome this problem, a straightforward solution is to use either broadband and hence incoherent nanosecond pulses or transform-limited picosecond pulses. Which is better is not a priori obvious. In this work we have carried out the study mainly to clarify this issue, and found that the use of transform-limited picosecond pulses is usually better than that of broadband incoherent nanosecond pulses.
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