From: Gerd Rosenbaum <rosenbaum@anl.gov> Date: Sun, 27 Feb 2000 15:06:57 -0600 Subject: Re: Software for fill-on-fill injection Message-ID: <38B98E1D.7954D1A5@anl.gov>
Bill, Mark was talking about fill-on-fill and not about the darn top-up. The PV's you point to in Linda DeVito's e-mail don't tell what Mark want to have: > - Next fill-on-fill injection will occur in N minutes > > - Previous fill-on-fill injection completed N minutes ago > Gerd Bill Lavender wrote: > > Folks, > > > > I am trying to modify my tomography software to work with fill-on-fill > > injection. What I need to do is the following: > > > > - ~60 seconds before a fill, stop data taking frames and take a final "flat > > field" for normalization > > > > - After the fill wait ~60 seconds, take another flat field and then continue > > taking data frames > > > > In order to implement this I need PVs which provide the following information: > > > > - Next fill-on-fill injection will occur in N minutes > > > > - Previous fill-on-fill injection completed N minutes ago > > > > Obviously other PVs from which the above information can be derived would also > > be fine. Is such information currently available? I could not find it in the > > Web documentation. If it is not available am I the only one who thinks it is > > important to have? > > > > Mark Rivers > > > > Well, Linda Devito sent out a mail message on Friday to a bunch of people > which contained most of this information. I looked at the list of recipients > for that message and for some reason your name wasn't on the list, so > here is a copy: > > > February 25, 2000 > > > > Top-up test starts @ 0800 Monday (2/28) > > > > No fill-on-fill refill at 7:45 > > > > 0800 the injection magnets will be pulsed at 2 Hz for 5 minutes for user > > triggering test > > > > 0805 a fill-on-fill to 100 mA, followed by top-up operation with 2 > > minute period > > > > 1100- 1105 triggering test repeated followed by fill-on-fill to 100 mA > > > > 1400-1405 triggering test repeated followed by fill-on-fill to 100 mA > > > > 1405 top-up operation continues until 0800 on Tuesday > > > > > > As a reminder, the following are the PV’s related to top-up: > > > > S:TopUpCurrent - Amount of Top Up current > > > > S:TopUpTime - Time of Last Injection > > > > S:MSLT:longTopOffGateBI - The Injection Gate Pulse > > > > S:TopUpInterval - Time between Injections > > > > I've just checked these PVs and they do seem to exist. > > Hope this helps, > > Bill Lavender
From: Mark Rivers <RIVERS@cars3.uchicago.edu> Date: Sun, 27 Feb 2000 14:09:45 -0600 Subject: Re: Software for fill-on-fill injection Message-Id: <000227140945.208051a4@cars3.uchicago.edu>
Bill Lavender wrote: > Well, Linda Devito sent out a mail message on Friday to a bunch of people > which contained most of this information. I looked at the list of recipients > for that message and for some reason your name wasn't on the list, so > here is a copy: > > > As a reminder, the following are the PV=92s related to top-up: > > S:TopUpCurrent - Amount of Top Up current > > S:TopUpTime - Time of Last Injection > > S:MSLT:longTopOffGateBI - The Injection Gate Pulse > > S:TopUpInterval - Time between Injections > > I've just checked these PVs and they do seem to exist. My message related not to top-up mode, but to normal fill-on-fill operations. You are correct that the PVs listed above exist, however their values seem to be meaningless during normal operations. For example, right now: S:TopUpCurrent = 0.26746392 S:TopUpTime = Feb 27, 2000 11:33:24 S:TopUpInterval = 1.0000000 The time of the last injection is correct. However, what does S:TopUpCurrent = .267 mean? They injected 100 mA during the last fill. What does TopUpInterval = 1.00 mean? They are not topping up, and it is certainly not the estimated time to the next injection. From the above PVs I cannot get the information I want: - Accurate prediction of the time of the next fill-on-fill injection so I can stop taking data just before it occurs. Is the TopUpTime the time when the injection was begun or finished? Is it guaranteed to be accurate to a few seconds? Mark
From: Bill Lavender <lavender@icarus.csrri.iit.edu> Date: Sun, 27 Feb 2000 13:49:23 -0600 (CST) Subject: Re: Software for fill-on-fill injection Message-Id: <200002271949.NAA23442@icarus.csrri.iit.edu>
> Folks, > > I am trying to modify my tomography software to work with fill-on-fill > injection. What I need to do is the following: > > - ~60 seconds before a fill, stop data taking frames and take a final "flat > field" for normalization > > - After the fill wait ~60 seconds, take another flat field and then continue > taking data frames > > In order to implement this I need PVs which provide the following information: > > - Next fill-on-fill injection will occur in N minutes > > - Previous fill-on-fill injection completed N minutes ago > > Obviously other PVs from which the above information can be derived would also > be fine. Is such information currently available? I could not find it in the > Web documentation. If it is not available am I the only one who thinks it is > important to have? > > Mark Rivers > Well, Linda Devito sent out a mail message on Friday to a bunch of people which contained most of this information. I looked at the list of recipients for that message and for some reason your name wasn't on the list, so here is a copy: > February 25, 2000 > > Top-up test starts @ 0800 Monday (2/28) > > No fill-on-fill refill at 7:45 > > 0800 the injection magnets will be pulsed at 2 Hz for 5 minutes for user > triggering test > > 0805 a fill-on-fill to 100 mA, followed by top-up operation with 2 > minute period > > 1100- 1105 triggering test repeated followed by fill-on-fill to 100 mA > > 1400-1405 triggering test repeated followed by fill-on-fill to 100 mA > > 1405 top-up operation continues until 0800 on Tuesday > > > As a reminder, the following are the PV’s related to top-up: > > S:TopUpCurrent - Amount of Top Up current > > S:TopUpTime - Time of Last Injection > > S:MSLT:longTopOffGateBI - The Injection Gate Pulse > > S:TopUpInterval - Time between Injections > I've just checked these PVs and they do seem to exist. Hope this helps, Bill Lavender