Speaker
Description
During the ATLAS phase II upgrade, the tracking system of the ATLAS exper-
iment will be replaced by an all-silicon detector called the ITk (Inner Tracker)
with a pixel detector as the most inner part.
The control and monitoring data of the new system will be aggregated from an
on-detector ASIC called MOPS (Monitoring Of Pixel System) and sent to the
DCS using a new interface called MOPS-HUB.
The hardware components of the MOPS-HUB, firmware specifications for the
FPGA of MOPS-HUB and its integration plan will be presented. In addition,
an irradiation plan for the new system will be introduced.
Summary (500 words)
The ATLAS experiment will get a new inner tracker
(ITk) during the phase II upgrade. The innermost part
will be a pixel detector. After the upgrade, the pixel de-
tector will have 5 times more modules than the present
state. The ATLAS pixel detector will use a serial pow-
ering scheme to reduce the number of services inside the
detector volume, therefore a new DCS (Detector Control
System) is being developed at the University of Wup-
pertal to fulfill the control and monitoring requirements
of the new pixel detector. The new DCS has an on-
detector ASIC called MOPS (Monitoring Of Pixel Sys-
tem) to monitor the voltages and temperatures of the
detector modules and other sub-detector components.
A system integration plan of the MOPS chip that in-
cludes powering and communication has been proposed
with MOPS-HUB as the central unit. MOPS-HUB is an
interface between the ITk pixel monitoring ASICs and
the DCS. It will aggregate measurement data from the
new MOPS chips and send all the values out to the DCS
control station. Besides that, the MOPS-HUB FPGA
will have a control and monitoring (voltage / current)
capability on the connected Controller Area Network
(CAN).
The core unit of MOPS-HUB will be the MOPS-HUB
FPGA. The Firmware design of the MOPS-HUB FPGA
will allow the communication with the MOPS chips over
CAN bus using an integrated CAN controller and a phys-
ical layer. In addition, the data aggregated between
MOPS-HUB FPGA and the DCS will go through dif-
ferent stages. First, MOPS-HUB FPGA will communi-
cate with an Embedded Monitoring and Control Inter-
face (EMCI) through low power differential signals called
elinks. Second, the EMCI will serve as a bidirectional
channel interface that will transmit the data through
a high-speed optical link to an Embedded Monitoring
Processor(EMP), which is placed in a non-radiation en-
vironment. The EMP will deliver the data to the DCS
by means of an Ethernet connection.
Some special requirements on the design and firmware
is also considered (e.g TMR) since MOPS-HUB will be
placed in a radiation environment. The hardware com-
ponents of the MOPS-HUB, firmware specifications for
the FPGA of MOPS-HUB and the integration plans of
the new chip will be presented. In addition, an irradia-
tion plan for the new system will be introduced
