December 22-24, 1997

December 22 , 23 , 24

December 22

• User run.
• We had a beam dump just after the injection in the morning (probably due to the rf problem while changing the rf frequency).
• Operation status in this morning:
  

  Time	Beam current	Beam lifetime	I*tau	Average pressure	Integrated current
  10:00 AM	396.9 mA	978 minutes	388 A*minutes	0.242 nTorr	506.9 A*hours

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

December 23

• User run.
• Operation status in this morning:
  

  Time	Beam current	Beam lifetime	I*tau	Average pressure	Integrated current
  10:00 AM	383.7 mA	928 minutes	356 A*minutes	0.252 nTorr	514.1 A*hours

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

December 24

• We finished the user operation of this year at 9:00 AM.
• The PF ring is under the scheduled shutdown now. The next operation will start on January 14, 1998.

We celebrated the successful commissioning and operation of the PF storage ring by rice-cake making ("Mochi-Tsuki") on Dec. 24.