Fridays will usually be maintenance days or used preferentially for work extending into the weekend. Users, with appropriate training, desiring a Friday for work extending into the weekend must sign up not later than 2 weeks before the Friday. If not assigned during a period less than 2 weeks before the Friday, the day may be designated for single day usage.
Up to three consecutive days per month will be assigned for core analyses. Core analyses are defined as those for which the Neptune was initially obtained and are solution analyses of Sr, Nd, Pb, U and Th. Users of these days are encouraged to prescreen their samples on the Element2 as much as possible for concentration and matrix adjustment and to coordinate usage with Jurek and/or Scot. Sign up for these days is on a first come-first serve basis.
A user group (defined inclusively as PI, post docs, graduate students, internal and external collaborators) may sign up for one 4-day consecutive session per month. Periods of less than 4 days are not regulated with regard to frequency of sign-up by any individual or group but good faith, non-exclusionary use is encouraged. 4-day periods that include Friday and weekend use are permitted.
Use of Neptune by independent outside investigators will be decided on a case-by-case basis dependent on instrument availability. Please contact Jurek for details.
Monthly Plasma Facility Steering Committee meetings will be held to fix the schedule up to 2 months ahead. Potential clients should send Jurek their "wish lists" for consideration at these meetings.
Users will endeavor to reasonably assist others in need of analyses on short notice.