Minutes for the 32nd MT Committee Meeting
Date: 3:00-15:00, April, 2010
Place: Nishina Bldg. room 201
Attendees: Sakai (Chair), Kubono (CNS), Kase, Fukunishi, Kamigaito, Sakurai, Kambara, Kubo, Ueno,Uwamino, Morita, Wakasugi, Shimoura (CNS), Uesaka (observer), Motobayashi (observer), Henning(observer), En’yo (observer)
Absentees: none(in no particular order)

Reports
FY2010 MT committee membersz

FY2010 MT committee member selection approved by the RNC (RIKEN Nishina Center)coordination committee.

z

The UEC (RIBF Users’ group Executive Committee) chair and the RNC deputy director wereinvited to the MT committee as observers.

1. MT schedule changesz

The MT (machine time = beam time) schedule for the experiments allocated for April 2-16 wasdelayed for 2 days due to the trouble with the ion source and AVF cyclotron.

z

Following the decisions of the 23rd MT committee meeting, extra days or hours for the BigRIPS
tuning were added to those allocated for May-June. The MT table presently posted on the website
already reflects this change. Also, following the 30th MT committee meeting, BigRIPS contactpersons for each experiment are now indicated in the MT Table.

2. Accelerator machine study reportsz

The performance of charge exchange foils was tested with a 70Zn beam from RILAC on March 9-10.

z

The acceleration of 238U was studied on April 6-23 through, e.g.,¾

the measurement of the equilibrium charge states with a carbon foil and an N2 gas at theenergies E/A=11, 14, and 15 MeV,¾

the measurement of the charge-exchange cross sections in a He gas at E/A=11, 14 and 15 MeV,¾

the test of various carbon-based material foils at E/A < 11 MeV,¾

the test of slow rotating foils, and¾

the test acceleration of q=69+ 238U with fRC

3. First half-year preparations for the PAC meetings
zProfessor R. Tribble has agreed to serve as the new NP-PAC chair upon the joint request of the RNC
and CNS directors.

z

NP-PAC: The deadline of the present NP (Nuclear Physics) proposal call for the RIBF use is May 7.

zML-PAC: The RAL proposal call will be skipped this first half-year due to the long-term shutdownof RAL(Aug 2010 – Feb 2011), but a call will be put out for ML (Materials and Life Science)
proposals for the RIBF use to undergo email screening by the ML-PAC committee.

Discussions
The minutes of the 31st meeting were approved
1. MT schedulingz

The UEC chair was invited to the MT committee as an observer as mentioned above.

z

Toward more transparent MT scheduling¾

In regard to BigRIPS experiments, it was approved to establish a plan for long-term use (2years) of the primary beam with individual plans to be made within that framework.

¾In accordance with this, the RNC deputy director presented a proposal for a two-year plan.

¾Regarding the BigRIPS experiments for this autumn, two proposals were made to conduct aseries of BigRIPS experiments with only 48Ca beams and the SHARAQ+48Ca series. The RNC
and CNS directors will decide which proposal to accept.

¾

A method will be sought that will allow RIBF users to participate more directly in the MT
scheduling process.

zRequest for making an earlier call for BigRIPS MT scheduling submissions¾The RNC deputy director will be staying at RNC for two weeks including the dates of the next
NP-PAC (June 14-15). Details of the MT allocation for the next autumn BigRIPS experiments
will be discussed at that time. To fit this process into the schedule, the call for MT schedulingsubmissions for autumn BigRIPS experiments will be made in late April—early May.

2. Experiment proposals to use SCRITz

The handling of experiment proposals requiring the use of equipment not explicitly listed in the callfor proposals, such as SCRIT, was discussed.

z

It was confirmed that both construction and experiment proposals to use SCRIT as well as otherequipment are accepted for PAC screening at any time.

3. Schedule of MT Committee meetingz

The next MT committee meeting will be held on May 18.