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User name yez
Log entry time 02:40:27 on October 13, 2010
Entry number 334578
keyword=Cannot see Multi-foils partten with Seive Slit in, but it is clear when Sieve Slit is outWe took run 7208, and 7232 for Multi-foils wiht sieve slit out, and from Fig. 1 you can see the clear partten. However, the partten is gone when the sieve slit is in (Fig.2). The problem maybe is from either a lot of electrons punch throughh the Sieve Slit plates, or the Slieve Slit itself is not in a good position. We will take data with Sieve In on LH2 target to see whether it is because of punching through.
I also plots the VDC distribution of run7230 and 7232, for comparation.
Figure 1
Figure 2
Figure 3
