WG: DTTF Upgrade
CMS Upgrade document 07.02
Proposal
Redesign of the Phi and Eta Trigger Track Finders for
SLHC
Submitted: 20/02/2008
Abstract
The Phi and Eta Trigger Track Finder processors, which are
part of the Drift Tube Trigger Track Finder (DTTF), are currently
implemented in FPGA technology. We propose to study upgrades using
newer technologies where appropriate. New input options from
upgraded muon detectors and the tracker will also be studied. The
track finding and sorting schemes will be adapted to the new
requirements.
Project Leaders/responsible: Janos Erö, Jorge Fernández de Trocóniz
Contact Person:
Claudia-Elisabeth Wulz
1 Introduction
The current DTTF system design in principle allows a possible
upgrade to SLHC requirements already in its present form. However,
it has to be adapted to the SLHC bunch crossing frequency as well
as to the final number, the format and the arrival time of input
track segments delivered by the drift tube chambers. The number of
boards could be reduced by optimizing the DTTF architecture,
taking advantage of new chip developments. The distribution of
input data among neighbouring sectors may be redesigned to use
fast serial links instead of the present parallel LVDS links and
multiplexing techniques. The current data input interface has
reserves of up to 17 bits per bunch crossing to include additional
information like possible tracker data. The output data format has
to be designed with respect to the subsequent members of the
trigger chain - the Sorters and the Global Muon Trigger.
The DTTF on-line and off-line software will be redeveloped in
accordance with the upgraded design. In order to re-balance the
signal-to-background
ratio
or
efficiency
vs.
rate,
the
extrapolation and pT-assignment lookup tables will have to be
reconsidered.
The
information
from
the
tracker
will
be
incorporated if available.
2 Participating Institutions
- Institute of High Energy Physics of the Austrian Academy of
Sciences, Vienna
- Universidad Autónoma de Madrid
- Other institutions for specific R&D tasks, as appropriate
3 Topic(s) and goal(s) of the R&D proposal
Activity 1: Study of input options: determine which subdetectors
deliver input and what will be delivered (type, amount,
information content); determine how/if tracker information can be
incorporated.
Activity 2: Determine new track finding and sorting schemes and
determine output to Global Muon Trigger.
Activity 3: Study of new chip developments and link technologies.
Activity 4: Design of new architecture, including redesign of
neighbour sector connections and connections with endcaps.
Activity 5: Prototype development.
Activity 6: Simulation studies: develop algorithms, calculate
rates and efficiencies.
Activity 7: Software development: on-line software to operate and
test the prototypes, off-line software for analysis and detailed
diagnostics.
Table 1 : Activity Matrix
Institution
Vienna
Madrid
Act. 1
X
X
Act. 2 Act. 3
X
X
X
Act. 4
X
Act. 5
X
X
Act. 6
X
X
Act. 7
X
X
4 Relation to other WG and R&D activities
The proposed R&D will be performed in close collaboration with
related projects. The Madrid and Vienna groups are already
participants in the proposal 07.09 (Upgrade of CMS Barrel Muon
Detector), which aims for an integrated muon trigger solution,
including the tracker. Proposal 07.09 contains studies on muon
trigger track finding. The present proposal specifies the details
related to the replacement of the current Phi and Eta Track
Finders in the framework of proposal 07.09.
The updated Global Muon Trigger, to which the DTTF delivers input,
is already a project of the Vienna group (proposal 07.03).
Technology evaluations for chips and links will be performed in
collaboration with related projects. More formal collaboration
agreements will be taken at the appropriate time.
5 Schedule
Table 2: preliminary schedule of the project
Year
Activity
Activity
Activity
Activity
Activity
Activity
Activity
1
2
3
4
5
6
7
2009
Q1 Q2 Q3 Q4 Q1
X
X
X
X
X
X
X
X
X
X
2010
Q2 Q3
X
X
X
X
X
X
X
X
X
Q4
X
X
X
X
X
Q1
X
X
X
X
X
2011
Q2 Q3 Q4
X
X
X
X
X
X
X
X
X
X
X
X
2012
Q1 Q2 Q3 Q4
X
X
X
X
X
X
X
X
X
X
X
X
6 Resources
The physicists and engineers listed below are able to work
part-time on the project.
Table 3 : Preliminary list of Institutions and available resources
Institution
Physicist/student
Engineer/Technical
Resources/Experience
Budget
resources
Vienna
I. Mikulec
H. Rohringer
C.-.E. Wulz
J.
K.
I.
N.
DTTF development,
Trigger
Supervisor
development
At least
15 kEUR
material
budget
per year
Madrid
J. F. de
Trocóniz
P. Rodriguez
7 References
Erö
Kastner
Magrans
N. (tech.)
DTTF software,
Eta Track Finder
development