Agendas of future SVT meetings

• Agenda to be announced

January 1, 2001

• Happy New Year! - all

December 25, 2001

• Merry Christmas! - all

Slides and/or minutes from past SVT meetings

1. SVT to do items - Bill
2. Coverage of Christmas holidays :
• We are not in a crisis beacause SVT will not be part of the L2 decision until after the holidays, still we want to have it running if silicon data is available.
• The SVT pager will be carried by:
• Alex until Friday Dec 21
• Luciano from Saturday Dec 22 to Tuesday Jan 1
• Luciano's desk drawer on Wednesday Jan 2
• Marco from Thursday Jan 3 on
• Bill will be reachable by phone for emergencies

• SVTmon update - Irene/Roberto

1. SVT efficiency with wide roads - Alex

1. Update on SVT efficiency - Alex / Xin page
2. Mods/fixes to Track Fitters - Un-Ki
3. Geometry after the shutdown /slides- Giovanni
4. A.O.B.

November 6, 2001

1. SVT configuration in database - Bill/Marco
2. Update on SVT efficiency - Un-ki/Marco/Alberto...

1. SVT Efficiency:
• Efficiency by Un-ki
• Alberto seems to find a better efficiency than Un-ki. The reason is not understood at this point. Here are his slides (1,2,3,4,5). The plots where obtained from Run 127844 (special SVT run). It was noted that, for efficiency studies, we should use data from runs where SVT was NOT cutting!
• Marco showed this plot.
2. Discussion on "Standard SVT ntuples" - Roberto
• Please e-mail suggestions to Roberto: he will filter them and come back with a more refined proposal next week.
3. Geometry files after the shutdown - Giovanni
4. Beam Position to ACNET - Marco
5. A.O.B.

1. Things to do by the end of the shutdown - Luciano
1. SVT configuration in database - Bill/Marco
2. Plan for "standard SVT ntuples" - Roberto
3. Geometry files after the shutdown - Giovanni
4. Beam position to acnet - Marco/Subir
5. Mods/fixes to Track Fitters - Un-Ki
2. SVT configuration stored in database? - Bill/Marco
3. "Final" SVT cabling - Stefano

    It was agreed not to do it now

Slides shown by Roberto for run 127844:

 
Straight line vs. sinusoid fit

127844_dsub_b3w1_online.ps: impact parameter, beam subtracted, global fit,

                            sine function,barrel 3, wedge 1.

127844_dsub_b3w1_sin.ps:    idem, sine fit wedge by wedge.

127844_dsub_b3w1.ps:        idem, staright line fit wedge by wedge

127844_dsub_b3w3_online.ps: wedge 3, global fit, sine

127844_dsub_b3w3_sin.ps:    idem, sine fit wedge by wedge

127844_dsub_b3w3.ps:        idem, straight line fit wedge by wedge

127844_d1d2.ps:             <d1*d2> versus cos(delta_phi), with linear fit

                            (without first and last point). Gives beam

                            width =34 micron.

The following plots were shown at the meeting:

1. Irene:
• Plot 1: x-y beam position from SVTbeam for the 6 barrels
• Plot 2: x of beam as a function of event number
• Plot 3: y of beam as a function of event number
2. Roberto:
• Plot 1: distribution of hits on layer 3 of some SVX wedge
• Plot 2 : x vs phi
• Plot 3: d vs phi with sine wave as found online by SVTbeam

1. The question was raised whether we want to keep XTRP tracks appended to the SVT output list. The decision was made to make two separate output streams: one with XTRP tracks appended will go to SVTlist interface in b0svt06 and will be readout to SVTY, the othe one will go to SVTlist in L2 crate and will be readout as SVTD. This will probably require one additional Merger which we would subtract from the available spares spares. Who exactly  is actually going to implement this and when was not discussed.
2. Bill, Simone and Franco will try to setup SVT to trigger a global Spy Buffer freeze upon detection of lost sync in any SVT board. The plan is to try this out with cosmic rays and be ready when the beam comes (next week?). This will probably require to disable SVTSPYMON: it should be a trivial fix for Marco when he comes back from vacation to modify it so that it's compatible with this particular diagnostic mode.
3. There was some discussion on the famous problem of mixing of constraint eigenvectors with track parameter eigenvectors, including suggestions on trying defferent vector ordering of the Graham-Schmidt orthonormalization procedure. The conclusion seems to be that the situation is under control. If you are interested in the details we suggest you talk to Giovanni.
4. Roberto: These two plots show the beam profile (subtracted impact parameter) for runs 119632, 119634 and 119635 (about 25000 tracks), barrel 2, all available wedges (i.e. 1,3,8,9,10,11), with a PT cut at 2 GeV. The beam position fit has been done separately in each wedge. In the first plot a chi2 cut at 70 has been used. In the second plot the chi2 has been recalculated (to correct for the half curvature problem) and a cut at 12 has been done. The fitted width is smaller (52 vs 57 um), and there is less background.

1. Roberto: plots from shot of last night with wedges 3 and 4
2. Wedge 0, though less populated, seems to show correct d-phi correlation.
3. AM patterns in wedge 0 go only up to 16k. The second AMboard is currently disabled. Standard AM diagnostics reveals that one AMchip is bad and one AMplug needs to be swapped. Alexei will do it
4. Stefano: a change was made to the configuration so that now the "dummy track" needed for Si-only track fitting is delivered to all the wedges through XTFA. See L2 logbook for details.
5. Un-ki: reminds us of the necessity of keeping track of what part of SVX is actually working at any given time in order to properly initialize HF'a and Mergers and avoid SVT hang-ups.
6. Bill: reveals a possible plan that would allow the HF's and SVT to run happily even when some (or most) SVX data streams are dead. We all agree this would be a very useful feature. He has our permission to implement it.
7. Yanwen: will (learn how to) run SVTSIM on raw data to validate the output of SVT.

1. Giovanni: a proposal for a L3 SVT filter will be presented at the next Thursday meeting. The idea is to have a module  to select events based on SVTD contents. We agreed we should use tunable parameters such as Chi square, impact parameter and Pt of both tracks, DeltaPhi min and max. It is in fact much easier to change a parameter than it is to change the code. This will feed off the Two Track Trigger at L1 and will "emulate" the effect of a SVT based L2 trigger. We expect the L1 Two Track board to work soon, otherwise an equivalent function might be obtained by using the di-electron trigger hardware in a non standard way. We might be able to put the events passing this selection in the express line.
2. Luciano: we need a plan for the configuration of SVT for the upcoming collisions. We all agree that we need to start with the same configuration as used for the last shot (silicon only, wedges 5-6, nominal geometry...). We still need to agree on what exactly we do next. After some discussion (continuing after the meeting) we propose the following sequence of steps each of which requires a different configuration of SVT:
1. Old stuff: same as last shot
2. Nominal geometry + XFT
3. Move gcon to the beam: fitting constants are corrected for beam displacement
4. Move patterns to the beam: AM patterns are corrected for beam displacement
5. Narrow patterns: change superstrip size to ~300 micron
6. Precise alignment
Note: we will proceed to the next step once the previous has been shown to work correctly. We believe that we will be able to do this even if only 1/12 of SVXII is powered up. We expect the plots in TRIGMON and SVTMON to be sufficient to validate each step.

1. Stefano is working on XTF simulation. Dealing with floating to integer conversions.
2. Dave Saltzberg reported few problems with SVT while testing Jane's board in L2 crate. Stefano will keep in touch with him.
3. Kendra is working on internal SVX alignment using data from 36x36. (see text and plots 1, 2, 3, 4, 5, 6)
4. Henry will explore the possibility of using the CDF hardware database to store information about all SVT boards. He will serve as the SVT contact person for this job as necessary.

1. Status of Cold Start: Stefano
1. succeded in running Bill's simulation
1. use GCON files from Vladimir
2. results seem to make sense
2. XTF configuration needs ~ 1 day of work
3. Simulation shows that the bias on parameters induced by the sign of the charge ot the track is almost cancelled in the new GCON files made by Vladimir
2. Data analysis: Roberto
1. hits outside of superstrip are present also in simulated data produced by Bill.
2. number of tracks per event is ~ 8 for simulated SVT and ~ 0.3 for real data. We believe most of this is due to the truncation of the readout of Jane's board. We need to make sure we understand what is going on.
3. correlation between SVT and COT/XFT it's there at the beginning of each run and then vanishes after some number of events. It happens for every run after a different number of events (10k - 50k?). This is potentially a serious problem and we need to watch it closely during the upcoming data taking. The easiest explanation would be loss of sync between SVT and the rest of CDF.
3. Simone: two XTFB boards have been delivered to Pisa and successfully tested.
4. Vladimir: the effect of the beam displacement on impact parameter resolution was studied with simulation which predicts ~28 micron resolution for centered beam and ~ 60 micron resolution for 4mm displacement. (see plot)

1. SVT-XFT efficiency from collisions: Luciano
2. SVT event display: Andrei

Event displays including SVT tracks were shown! Some of the SVT tracks look totally uncorrelated to COT hits. This will be investigated further.
3. Plan for next shot (~27 May): prepare two independent configurations:
1. Exactly the same as last shot
2. Including XFT tracks in the fit. We will use the memory bank switch feature of the TF's to change quickly from 1 to 2.

1. Results of simulation of SVT in different configurations: Donatella
2. Results from last shots: Roberto
• description and plots
3. To do list for next shot: All
4. A.O.B.

1. Plots from the last shot (file1, file2): Roberto
2. Beam tomography: Luciano

1. SVT Event Display: Andrei
2. New GCON file plots (file1, file2, file3, file4): Vladimir

We just learned that collisions have been dalayed by ~one week.
The projected collision date is now ~ Apr 27.

1. Organization of 24/7 shifts for next store
• Luciano will make a proposal
2. What did we learn from data from last stores?
• Roberto: plots of data from SVTD show no evidence of good tracks
• Un-Ki: impact parameter plots of data from TF Spy Buffers show hint of displaced beam profile
3. Status and plan for running SVTSIM
• Bill will teach Marco how to run SVTSIM on the data taken during the last shots. The plan is to verify that we can get sensible results running SVTSIM off SVT and XFT data on tape using the current version of SVT constants.
4. Status and plan for Cold Start, Maps, etc.
• Guram has plots showing that current constants actually weigh XFT tracks significantly. This is not what we want at the beginning. We need a set of fit constants that ignore XFT data.
5. Can we feed simulated data to SVT?
• We will meet today at 14:00 in Luciano's office to discuss what needs to be done. The plan is to have realistic data "pumped" by one HF per phi sector into SVT all the way through SVTD. Data flow will be synchronized to L1A.

1. Stefano looks at XTRP data in Spy Buffers to try to make sense out of them.
2. Marco runs SVTSIM with help from Bill
3. Guram and Vladimir will generate geometry files to ignore XFT and fit tracks with silicon only
4. Un-Ki will investigate errors in TF output seen in SVTD but not in Spy Buffers

"To do" list for next shot: Bill

1. Ghostbuster board: Bill
2. SVT integral test: Un-Ki
3. XTFC: Anna Maria

1. SPYMON: Marco
2. Offline basic tools and TRIGMON: Roberto
3. Event Display: Henry
4. Test Stand: Alexei

1. Beam Position Feedback: Luciano
• Sender-Receiver
• Web page with numbers
• Web page with graphics
2. XTFA-XTFB : Simone
3. Cold Start & SVTSIM: Bill
1. slides, map set example, random test example

1. Board diagnostics: Franco
2. Low level VME code: Stefano
3. High level geometry files: Giovanni

1. Board documentation: Luciano
2. SVT integral test: Un-Ki
3. XTFC: Anna Maria
4. Low level board functions: Subir/Marco

1. Event Display: Henry
2. Test Stand: Alexei
3. SVT simulation: Bill
4. Ghostbuster board: Bill
5. GUI for simple SVT functions: Alex'

1. SPYMON: Subir
2. ODH alarm drill: all
3. Offline basic tools and TRIGMON: Roberto

1. Track Fitter status - Un-Ki
2. XTFA-XTFB : Simone
3. SVTSIM: Bill
4. Cold Start: Bill

WORKSHOP

1. Beam Position Feedback: Luciano (see also old talk of April 2000)
2. Low level VME code: Stefano
3. High level geometry files: Giovanni

1. Low level board functions: Subir/Marco
2. Board diagnostics: Franco
3. Board documentation: Luciano

Some notes:

General: the rotation of all the tasks is finished. Our Geneva collegues have expressed interest in task#20: "Off-line high level tools" and Lorenzo Moneta has volunteered to give a talk on this subject at the upcoming workshop.
The following tasks are still uncovered:
04. Integration with XTRP and Level2
19. Implement VRB readout + diagnostics
21. Plan for long term maintenance
22. Level 3 algorithms
23. Documentation

Next week we will start the second rotation of talks (see new agenda for Jan 30th)

Board documentation: we do not yet have a final decision on where exactly the official SVT documentation web pages will be located. We want to start with a prototype site that can be moved easily to the final location once decided. At least to zero order, we will have a local copy of all documents, organized in a self-consistent and portable directory structure.

Mel's suggestion: firmware source files have a better chance to be up to date in directories at remote institutions. In this case a pointer to the remote directory might be a better choice than a local copy of the documents.
Giovanni's comment: there must be a safe way to know what version of the firmware is actually loaded in the boards at B0.

Beam Alignment: moved to next week.

1. SVTD unpacking routines: Bill
2. Ghostbuster board: Bill (see also pdf note)
3. SVT integral test: Un-Ki
4. XTFC: Anna Maria

 
SVTD unpacking routines: needs access to geometry database to reconstruct hit coordinates. Must wait until the mechanism for accessing these data is defined and implemented. Bill and Giovanni are working with top priority on the geometry database definition and implementation: they will keep in touch and move as fast as they can.

Ghostbuster board: first prototype is expected by April 1st, final board usable in SVT by late Summer.

SVT integral test: also needs access to geometry database (see above) to generate test data and predict results.

XTFC: Anna Maria presented a possible solution to the problem of the phi mismatch of L00. This would require no additional hardware, only some firmware changes and a different cabling.

It was agreed that we are not planning to run anything else than 4/4 (no L00) until we reach a  stable routine operation of SVT, presumably not before the last quarter of 2001. This sets the time frame for XTFC and Ghostbuster board.

1. SPYMON: Marco (continues)
2. Offline basic tools and TRIGMON: Roberto
3. Event Display: Henry
4. Test Stand: Alexei

SPYMON: the infamous Fision bug that causes trouble to SPYMON has been apparently identified but has not been fixed yet due to lack of manpower. Henry will try to get the priority of this job increased. A workaround exists that will allow Marco to go on with his development work until the bug is actually fixed.

Offline basic tools and TRIGMON: it was agreed that the SVT monitoring software Roberto is defining and implementing will, by definition, run in the standard CDF offline environment. It will use data from the SVTD bank and have access to the whole CDF event data, to the online/offline database and to SVT simulation. Most of this software will be used both online as part of consumer processes (ex. TRIGMON) and offline as AC++ modules.

Event Display: it is very important that we come up with a documented standard unpacking routine for SVTD as soon as possible. This is not totally trivial due to the need of translating x coordinates from local increments from a road boundary to global coordinates. This requires knowledge of the detailed geometric parameters of each road and, therefore, requires access to the SVT geometry database. This tasks tends to belong to Bill's realm. So the deal with him is that, at the next meeting, he will tell us how far we are from having the SVTD standard unpacking routines done (Next meeting's agenda was updated accordingly)

Test Stand: Alexei is setting up the SVT test stand in the lab at the west end of B0 2nd floor. He was having problems with the crate CPU that are now apparently solved with Bill's help as explained in this message.

1. XTFA-XTFB: Simone
2. SVTSIM: Bill
3. Cold Start: Bill
4. SPYMON: Marco

1. Low level VME code - Stefano
2. Track Fitter status - Un-Ki
3. High level geometry files - Giovanni

Un-Ki kindly agreed to take responsibility for task #14:
Whole SVT test with fake injected data
(see Task List)

LFR-12JUN01