A thermal simulation of the STS detector in the CBM experiment using open-source computational fluid dynamics (CFD) software package OpenFOAM(R) is presented. The interactions of various detector components such as silicon sensors, heat sinks and electronics are simulated. The effects of radiation damage on power dissipation and the resultant electrical noise in silicon sensors are included in...
GridPix detectors are a relatively new detector technology with a high density pixelated readout ASIC and a Micromegas style gas amplification stage. Due to the aligned mesh holes and pixels, a high efficiency for detecting and separating single primary electrons can be achieved. This leads to excellent spatial and energy resolution which can be used as a readout for Time projection chambers...
ATLAS and CMS are using CO2 cooling for their phase-2 upgrade inner detectors. The challenges for the new cooling with respect to past CO2 systems are the on-detector colder temperatures required (<-40'C) and the large increase of the heat load with 2 orders of magnitude. The final predicted heat loads for ATLAS is 300 kW and for CMS 550kW.The cooling will be segmented in sub-units with a...
Flow distribution capillary tube testing for the CMS silicon detector upgrades
Abstract
At CERN, developments are ongoing around evaporative CO2 cooling technologies used for thermal management of new silicon particle detectors for the high luminosity upgrade. These new detectors are set to be installed in the new CMS and ATLAS experiments during long shutdown 3. The 2 Phase...
The TB2S (Tracker Barrel 2S) is part of CMS tracker system. TB2S ladder is a specialized structure made with Carbon Fiber (CF) and Aluminum Carbon Fiber (Al-CF) materials designed to mount silicon modules on it, along with the necessary services inside the CMS tracker system. The TB2S ladder has two main features, firstly, it provides mechanical support to the silicon modules, and secondly, it...
During LHC Phase II, the CMS tracker will be updated to increase its performance given by the higher luminosity. One of the goals of this upgrade is to cover the maximum surface and to not leave gaps around the interaction point, to increase the global performance of the detector. In order to reach it, TBPX (Tracker Barrel Pixel) design is divided into four halves. The halves are staggered...
The Composites Manufacturing and Simulation Center at Purdue University is responsible for the delivery of final CMS Barrel Timing Layer Tracker Support Tube (BTST) and inner tracker support tube (ITST) for the LHC Phase II high luminosity upgrade. Challenges and lessons learned while prototyping, re-designing for manufacturing in composites, simulation, and testing will be presented for...
The installation process of the new Outer tracker (OT) and Barrel timing layer (BTL) -detectors in CMS will be a demanding operation, due to their combined weight is ~20% heavier than the old silicon strip tracker. This means that some of the existing installation tooling from the past cannot be re-used.
The dynamic support frame structure, often referred as the โeiffel towerโ, is used in...
In the ATLAS barrel strip system silicon strip modules are mounted on local supports (staves). The staves are supported on four large concentric carbon fibre support cylinders. During the integration the cylinders will first be installed within the Outer Cylinder that contains all of the Inner Tracker (ITk), and the staves will then be inserted into this structure from both ends. Insertion...
As part of the ATLAS detector upgrade at the LHC, the existing tracking detector end-caps are being replaced by more powerful silicon sensors. Newly developed sandwich support structures with modern silicon chips on their surface will be integrated. This new generation of sensors will maintain and increase the recording quality of the ATLAS detector for the high luminosity phase of LHC.
The...
The new ATLAS Inner Tracker (ITk) will replace the current tracking detector of the ATLAS detector to cope with the challenging conditions for the Phase-II upgrade of the Large Hadron Collider experiment (LHC), the so-called High Luminosity LHC (HL-LHC). The new tracking detector is an all-silicon detector consisting of a pixel inner tracker and a silicon microstrips outer tracker,...
The ATLAS ITk strip sensors employ silicon wafers, supported by carbon fiber staves with sandwich construction. The sensors are equipped with hybrid and powerboard flexes that are bonded with rigid adhesives. The sensor layout varies across different detector regions, including changes in wafer geometries, number and composition of the flexes, and adhesive layout. During preliminary cold...
One of the most mission-critical adhesive applications in ATLAS ITk, and indeed in any modern silicon tracker, is in the construction of the local supports and their interfaces to the detector modules. Adhesives in this application must bond to a variety of surfaces, including carbon and silicon, and embody a complex combination of traits in modulus, thermal conductivity, and reworkability. A...
For the high-luminosity LHC (HL-LHC), CMS will install a completely new silicon tracker. The future Outer Tracker will consist of two barrel parts and two endcaps, one at each end. Two types of silicon detector modules are being utilized, the Strip-Strip (2S) modules for the outer radii and the Pixel-Strip (PS) modules for the inner radii. For the PS modules, the entire bottom of around 5 x 13...
In the development of silicon detector with higher granularity for better tracking seeding and vertexing, the resulting higher heat dissipation needs to be efficiently extracted to maintain the readout chip (ROC) at its preferred operation temperature and avoid thermal runaway. The structural materials thermally connect the sensors and ROCs to the mixed phase CO2 cooling pipes. It is crucial...
The IDEA detector is one of the concepts under research for the electron-positron Future Circular Collider (FCC-ee). The Vertex Detector, located in the innermost part, and occupying a cylindrical volume of 35 mm radius and 550 mm length, is expected to dissipate about 120 W. To remove this heat, a cooling system based on forced air convection is under development. Such a technical solution...
