oh and I need to know what Crate it is going into before I edit the code.
Cheers,
Adam
On Mon, 2 Jun 2003, Adam Jon DeGrush wrote:
> wtf
>
> is 1 channel all you will need in the future? does the "i" in iadc mean
> current and "v" = voltage. it looks like 2 channels, adc & dac. explain.
>
> adam
>
> note: these will not be read out with an alarmingly high frequency, in
> fact right now you have to prompt it to be read out. also what are the
> voltages (standby and operational), ramp up, ramp down rates and trip
> currents for that channel?
>
>
> On Mon, 2 Jun 2003, Dan Cheever wrote:
>
> >
> > >
> > >On Mon, 2 Jun 2003, Adam DeGrush wrote:
> > >
> > > > Hi,
> > > >
> > > > If by BLAST HV supplies you mean Lecroy HV mainframes, I do believe I
> > > need to be
> > > > involved in this as well. Incorporating new elements in the epics
> > > control is not
> > > > exactly straightforward.
> >
> > Hi Guys,
> > What we need for tomorrow afternoon, tues 6/3, is (1) HV channel under
> > epics readback and control BUT housed in the existing mainframes used by
> > BLAST. NOT a new mainframe. Is this a "new element"?....if so please get
> > started on modifying the database(s) so we can talk to a spare 3mA HV card
> > under epics. Karens choice of slot.
> > Call the records "IP:temp:vdac...... idac.. :iadc... :vadc...
> > Thanks,
> > -Dan
> >
> > > >
> > > > Cheers,
> > > > Adam
> > > >
> > > > Townsend Zwart wrote:
> > > >
> > > > > Dear All,
> > > > > I propose we take the following actions w.r.t ION polarimeter
> > > devices.
> > > > >
> > > > > 1) EMCO supplies should be replaced. These devices are
> > > inadequate.
> > > > > Let's try BLAST HV supplies which have current readback. Dan is
> > > > > coordinating this with Karen and Tancredi. We do not need to move them
> > > > > all at once.
> > > > > 2) Results of tests show that the sagging voltage on upstream
> > > spherical
> > > > > deflector is e-beam related and independent of supply voltage and target
> > > > > thickness. We should see how this device performs with a better supply.
> > > > > Either EG&G or BLAST HV.
> > > > > 3) Failing ION polarimeter should be run at 30 kV for now.
> > > There is no
> > > > > need to run this device at 60 kV until we want scattering asymmetry. We
> > > > > are constructing a printed circuit board floating ammeter which will
> > > > > have better HV standoff properties. This should be available in ~two
> > > > > weeks.
> > > > >
> > > > > TZ
> > > > >
> > > > > Yuan Xiao wrote:
> > > > > >
> > > > > > For 5/30 C shift:
> > > > > >
> > > > > > Around 9:30pm, got the beam to measure the RF effect of the
> > > > > > storage ring to the lenses. No obvious effect was observed
> > > > > > -- the signal picked up by the HV cable from lenses was only
> > > > > > 1dbm bigger than the noise picked up at D tunnel.
> > > > > >
> > > > > > Current from each lenses was measured again. Several nA
> > > > > > was got from the split lenses before and after Wien Filter (WF)
> > > > > > and from WF plates. Tens of uA was seen from the outer shell
> > > > > > of the spherical deflector (SD) and the plit lens before it; no
> > > > > > current was seen from the inner shell of SD.
> > > > > >
> > > > > > Chi, Yuan, Genya,
> > > >
> >
> >
>
>
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