December 15-21, 1997

December 15 , 16 , 17 , 18 , 19 , 20 , 21

December 15

• Machine study.
• Study on the low-emittance optics (105 degrees/cell) was carried out.
• Staffs of the science & instrumentation observed the first synchrotron radiation from the low-emittance beam from 1:54 to 6:10 PM.
• Measurement of the beam emittance was carried out after that.
• Study on the orbit feedback system was carried out in the midnight (under the usual medium-emittance optics).

Beam current (blue) and lifetime (red) today.

December 16

• User run.
• Operation status in this morning:
  

  Time	Beam current	Beam lifetime	I*tau	Average pressure	Integrated current
  9:00 AM	378.1 mA	1042 minutes	394 A*minutes	0.233 nTorr	464.4 A*hours

Beam current (blue) and lifetime (red) today.

December 17

• User run.
• Operation status in this morning:
  

  Time	Beam current	Beam lifetime	I*tau	Average pressure	Integrated current
  10:00 AM	385.9 mA	960 minutes	370 A*minutes	0.243 nTorr	471.7 A*hours

Beam current (blue) and lifetime (red) today.

December 18

• User run.
• Operation status in this morning:
  

  Time	Beam current	Beam lifetime	I*tau	Average pressure	Integrated current
  10:00 AM	386.7 mA	938 minutes	363 A*minutes	0.245 nTorr	478.7 A*hours

Beam current (blue) and lifetime (red) today.

December 19

• User run.
• During the injectin in the morning, we had a minor problem on the magnet control software.
• Operation status in this morning:
  

  Time	Beam current	Beam lifetime	I*tau	Average pressure	Integrated current
  10:10 AM	389.8 mA	990 minutes	386 A*minutes	0.238 nTorr	485.8 A*hours

Beam current (blue) and lifetime (red) today.

December 20

• User run.
• We found a failure with one of the distributed ion pumps (DIP#26) at 6:35 AM. We temporarily turned off this pump.
• Operation status in this morning:
  

  Time	Beam current	Beam lifetime	I*tau	Average pressure	Integrated current
  10:00 AM	343.3 mA	1084 minutes	372 A*minutes	0.236 nTorr	493.1 A*hours

Beam current (blue) and lifetime (red) today.

December 21

• User run.
• Operation status in this morning:
  

  Time	Beam current	Beam lifetime	I*tau	Average pressure	Integrated current
  10:00 AM	381.5 mA	1009 minutes	385 A*minutes	0.246 nTorr	499.9 A*hours

Beam current (blue) and lifetime (red) today.