th e project is supported by the hungarian scientific research fund (otka): t043145
DESCRIPTION
START. STOP. Sector 10. Sector 11. 8 PoN + 2 BPC. Device. N. End of single measurement thread. Device. A re there any non-measured connections?. Repeat measurement cycle?. Unblock MAB of the given camera. Device. Get optical connection list from DB. N. JDBC. 8 PoN + 1 BPC. - PowerPoint PPT PresentationTRANSCRIPT
The project is supported by the Hungarian Scientific Research Fund (OTKA): T043145TWEPP 2007 conference, Prague, 3-7 September 2007
Results and Consequences of Magnet Test and Cosmic Challengeof the CMS Barrel Muon Alignment System
Bencze, Gy. L.3,4, Béni, N.1, Imrek, J.2, Molnár, J.2, Novák, D.2,Raics, P.1, Sass, V2, Szabó, Zs.1, Székely, G.2 , Szillási, Z.1
More than 500 measurement cycles have been completed, the results can be summarized as follows:- The system worked correctly and provided results that could be interpreted.- The dynamic running scheme has proved to be very efficient leading to fully parallel operation of the board PCs.- A full cycle lasted about 100 minutes. This is already acceptable for future CMS operation, however, speed-up is foreseen.- Control of the operating muon chambers through the chamber DCS system went smoothly even at the maximum load of the channel.- A separate test has been made during the MTCC to check the operation of commercial Ethernet switch units in magnetic field. This test was also successful.- The resolution of the system in the most important phi-direction is ~20 micrometer, well below the specification. This enabled us to detect even thermal deformations due to the daily temperature oscillation.- The irreversible deformation (shrinkage) of the full barrel yoke during the first magnet operation as well as the elastic deformation under field during the changes of the magnetic field have been observed. The result is in good agreement with the preliminary finite-element calculations.
1 Institute of Experimental Physics, Debrecen University, Debrecen, Hungary H-40012 Institute of Nuclear Research (ATOMKI), Debrecen, PO BOX 51. Hungary H-40013 Institute of Particle and Nuclear Physics, Budapest, Hungary H-15254 CERN, CH-1211 Geneva 23, Switzerland.
Fig.1 Optical network of the Barrel Muon Alignment System
Wheel -2
Wheel -1
Wheel 0
Wheel +1
Wheel +2
Sector10
Sector11
Board PC (BPC)
PIConNET (PoN)
DT MiniCrate (MC)
DT XDAQsystem
5 MC
4 PoN + 1 PBC
2 BPC
8 PoN + 2 BPC
8 PoN + 1 BPC
8 PoN + 2 BPC
Main Workstation
Ethernetswitch DB
9 MC
Fig. 2 Part of the setup during the MTCC
Fig.3 Logical scheme of the MTCC setup
Fig.4 Flow diagram of the measurement cycle Fig.5 Data flow scheme
Fig.6 Daily thermal effects Fig. 7 Non-elastic shrinking of the barrel yoke
Dev
ice
Dev
ice
Dev
ice
Customprotocol
TCP/IP
PVSS
DIMConfiguration and
calibration data
measured dataJDBC
DetectorControlSystem
FSM
Devices:● MAB through BPC
- Cameras- LEDs- Temperature/Rel. Humidity
● Chamber LED sources (Forks) through PoN or XDAQ
Dev
ice
Dev
ice
LocalDB
Measurementcontrol (Java)
-Rigid structures (MABs, z-bars)
-Videocamera boxes (on the MABs)
-LED-holders (called forks) on the chambes
-Diagonal and z-LED holders (on the MABs and z-bars)
-Board computers (one for each MAB)
Barrelmuonchamber
MAB
MAB -1/9, DT 0/10/1R/Fork3/FLED1
Is it a barrelchamber LEDmeasurement?
Take next connectionfrom the list
Y
N
Y
Y
Y
Y
NN
N
Y
ReserveMAB of thegiven z-LED
Measure theconnection
(separate thread)
Are there anynon-measured connections?
Y
N
Set every connection as non-measured
N
N
STOPSTART
Get opticalconnection list
from DB
Y
End of singlemeasurement
thread
Opt
ical
line
isa
diag
onal
mea
sure
men
t
Repeatmeasurement
cycle?
Connection is already
measured?
Is the cam. MAB used by other
measurement?
Is the chamberused by other
measurement?
Is it a z-LED measurement?
N
Is the MAB used by other
measurement?
N
Reservechamber of the
given LEDReserve
MAB of thegiven camera
Set connectionto “under
measurement”
UnblockMAB of the
given z-LED
UnblockMAB of the
given camera
Y
N
N
Optical line is a diagonal measurement
Is it a barrel chamber LEDmeasurement?
Is it a z-LEDmeasurement?
Unblockchamber of
the given LED
Y
N
Set connectionto “bad
measurement” (+ errcode)
Was themeasurementsuccessfull?
Set connectionto “good
measurement”
Y
N
~15 μm
~2.7 mm
MAB +3/11, ZLED3, MTCC phase 1
~ 2.9 mm
MAB +3/11, ZLED3, MTCC phase 2
Fig. 8 Elastic shrinking of the barrel yoke