We present the design and prototyping of the coupled ring cooling loop to be used in the 2 phase C02 cooling of the ATLAS Pixel Inner System for ATLAS at the HL-LHC. The ring is fabricated using thin-wall titanium tubing and must be fabricated to exacting tolerances to fit the composite structure on which the pixel sensors and readout chips are mounted. The tooling developed to realize this...
The ATLAS Endcap Outer Pixel mechanical structure for the High Luminosity LHC is coming to its final stages of design. In this presentation I will report on past and current R&D of the global and local supports.
I will describe the design of the local support structure mechanics, the production techniques developed. The results from thermal and mechanical FEA will be compared with data...
The High-Luminosity LHC (HL-LHC) plans to increase the integrated luminosity of the current accelerator more than an order of magnitude, up to around 4000 fb-1, and the instantaneous luminosity from 2x1034 to ~7.5x1034 cm2s-1. The current detectors need to cope with this increased particle environment with more channels per unit area, faster electronics, and higher radiation tolerance, keeping...
The High Luminosity LHC will reach an instantaneous luminosity of $5 \times 10^{34}\ \mathrm{cm^{-2} s^{-1}}$ with 140 to 200 pp collisions per bunch crossing and collect a total of 3 $\mathrm{ab^{-1}}$ of 14 TeV data. To cope with these challenging data conditions, the CMS Inner Tracker will be rebuilt for Phase II Upgrades. To limit particle occupancy to the per mille level and improve track...
Thermal finite element analyses (FEA) of representative and realistic structures in the CMS Phase II Tracker Forward Pixel detector are presented. The high granularity of the sensors and associated readout electronics (modules) necessary to take data at the High Luminosity LHC will generate 60 kW of heat that needs to be extracted for the sensors to be maintained around -20C. The FEA of...
The primary support structure for CMS Phase II Inner Tracker detectors, known as the service cylinder, has been through its first iteration of prototyping at Purdue University’s Composites Manufacturing and Simulation Center (CMSC) and Purdue Silicon Detector Lab (PSDL). The mass, stiffness, and dimensional tolerance were the primary design objectives. In order to meet the extreme mechanical...
Bus tapes are flexible solutions for powering and extracting data from compact detectors such as silicon trackers. A common strategy for assembling the bus tape is to co-cure it over carbon fiber facings that serve as tracker modules' support. The process of co-curing can introduce defects in the bus tape due to different thermal expansion between the tape material and the carbon fiber. These...
We propose to present quality assurance techniques used at both Iowa State University and Yale University physics departments as integral parts of the ATLAS Phase II Upgrade strips detector barrel stave core production cycle. Specifically, we will address thermal imaging and bending tests as well as novel approaches to assuring structural bond integrity in composite honeycomb structures.
Support structures for tracker detectors are used to hold the detector’s sensors and the associated services. During the structural design process, one of the objectives is to minimize the displacement of the sensors during operation. Two different designs are commonly used: a sandwich arrangement of two laminates and a core, and a single laminate reinforced by local eccentric stiffeners. The...
Tracker detector structures are designed to minimize the sensor displacements during operation. The various structural components are often interconnected by means of glued or bolted joints. The bolted joints can leave room for small localized displacements, decreasing the total stiffness of the structure. It is important to take into account these effects in order to properly design the...
As CERN prepares for the High Luminosity LHC upgrade (HL-LHC), several detectors & components of the experiments need to be replaced with upgraded versions designed to take full advantage of the increased luminosity.
We will present ongoing work for the creation of an integrated system for radiation intervention planning, to be used in the preparation for the decommissioning of the ATLAS...
The LHCb Detector will undergo an upgrade during the current LHC shutdown. The Upgrade Tracker (UT) is a silicon strip tracking detector being constructed as part of this upgrade. The UT will provide a fast momentum measurement for the trigger as well as function as part of the overall tracking system where it will severely reduce the presence of “ghost” tracks.
The UT Tracker consists of...
To be added
The Inner Tracking System detector of the ALICE Experiment at CERN laboratory will be replaced in 2020. The upgraded system will be equipped with seven layers of Monolithic Active Pixel Sensors. The Tracking layers are divided in two groups: the Inner Barrel, grouping the innermost three layers, and the Outer Barrel, consisting of the outermost four layers. Each Layer is azimuthally segmented...
Due to its many favourable thermo-physical properties, CO2 in boiling state has been adopted as preferred refrigerant for the future generations of silicon detectors at the LHC. The data available on CO2 boiling in channels of small hydraulic diameter (say, below 3 mm) is limited and often affected by too large uncertainties. This obliges the detector designers to long iterative phases of...
Two phase CO2 cooling is used in several HEP experiments. One
application is for cooling the vertex detector of Belle II, using a 3 kW
chiller unit (IBBelle).
Recently commercial CO2 chiller with this cooling power became
available, aimed to be used in supermarkets. These units are compact and
available for a fraction of the costs (purchase and service) for
in-house assembled units like...
As the core detector of the CBM experiment, the Silicon Tracking System (STS) located in the dipole magnet provides track reconstruction & momentum determination of charged particles from beamtarget interactions.
Due to the expected irradiation damage (fluence - 10¹⁴ neq (1MeV)/cm²), the silicon microstrip sensors will dissipate < 6 mW/cm² at -10°C. Thus it is imperative to keep the sensors...
The Compressed Baryonic Matter (CBM) experiment at FAIR is a heavy-ion physics experiment, conceived for high-rate beam-target interactions to allow for the exploration of the phase diagram of strongly interacting matter at highest net baryonic matter densities. The FAIR facility is currently under construction. The CBM detectors are close to desigh finish and the start of series assembly....
Recent developments in the mechanical supports for the next generation of large area tracking systems at HL-LHC have established the benefits of large-scale multi-module systems. In this presentation, we report on an evolution of this approach targeted towards future large area tracking systems for future e+e- and pp collider experiments.
We will describe the design of a large-scale...
DESY and the other Helmholtz centers and institutes participating in the Helmholtz research field Matter are currently preparing the application for the next funding period, which will start in 2021. With this document we will try to increase the visibility of detector mechanics and cooling, and put more emphasis on generic R&D in these topics. In parallel to the general funding application we...
Position-sensitive silicon tracking detectors at collider experiments and elsewhere require advanced
solutions for mechanical support and cooling. Integrated low-mass systems must be developed that
offer efficient heat removal and miminize the impact of the support and cooling systems on the
material budget of the detector.
Cooling the detector through micro-channels in silicon offers...
CO2 cooling has been the ideal cooling technology for detectors since its introduction for the LHCb-VELO cooling in the beginning of the millennium. The target operational temperatures for silicon detectors have been lowered over the years stretching the CO2 cooling technology to its limits. Detector cooling typically having small tubes need a high pressure evaporative fluid to be able to...
Robots of different characteristics and designs are emerging and becoming essential for solving challenging problems in industry and harsh environments. Aiming to increase safety, robots can help perform repetitive and dangerous tasks, which humans either prefer to avoid or are unable to do because of hazards, size constraints, or the extreme environments in which they take place, such as...
The cooling system for the CMS Tracker is currently being designed within the scope of the Phase II upgrade. In order to limit radiation damage to silicon modules, and ensure detector performance for its expected lifetime, the silicon must be kept as cold as possible. Evaporative CO2 cooling is chosen because it is possible to keep a fairly constant cold temperature throughout the detector,...
One of the most notable features of the Phase 2 CMS Tracker upgrade is a novel geometry, used in the TBPS sub-detector (Tracker Barrel with Pixel-Strip modules), in which the silicon detector modules are tilted towards the beam interaction point. Compared to traditional barrel/endcap geometries, this tilted concept provides clear advantages in terms of mass and cost saving, but poses...
For the High-Luminosity LHC, CMS will install a completely new silicon tracker. The future tracker will consist of two barrel parts and two endcaps (TEDD), one on each side. One TEDD is made of five double-disks, each equipped with detector modules on all four faces to ensure a complete coverage. The backbone of the mechanical structure of the TEDDs are highly integrated half-disks, the...
