ECL 2018 Autumn Workshop
Prof. Blake D. Sherwin
University of Cambridge, UK
26 September, 2018
Venue Block C4, room 268
«Seeing the beginning:the Cosmic Microwave Background and what it can tell us about our Universe»
By studying the cosmic microwave background (CMB), we can look back in time and reveal the fiery early
universe when it was only 0.003% of its present age. In this talk, I will discuss how, by studying the CMB, we can find out about the origin, composition, and ultimate fate of the universe. I will also briefly outline some of the CMB data analysis methods that may be applicable in other fields.
28 September, 2018
Venue Block C4, room 268
«CMB Lensing: Fundamental Physics from Maps of the Invisible»
Dark matter not only forms an invisible cosmic scaffolding within which galaxies form, its distribution in the universe also contains a wealth of information about neutrinos, dark energy, and physics at the earliest times. Measurements of gravitational lensing in the cosmic microwave background (CMB) allow this matter distribution to be directly seen and mapped. In my talk, I will first discuss recent measurements of CMB lensing and their scientific implications. I will then explain why upcoming measurements of the CMB lensing signal, with experiments such as AdvancedACT and Simons Observatory, will be remarkably powerful probes of cosmology. Lensing is not only a signal, however, but also a source of noise that limits how much we can learn about the very early universe. With illustrations from recent work, I will explain why delensing – removing the lensing effect to reveal the primordial sky – is crucial for the future of CMB cosmology.
Prof. Xuelei Chen
National Astronomical Observatories,
Chinese Academy of Sciences, China
Venue Block C4, room 268
«Cosmology Research in China»
I’ll give a brief overview on the major cosmology-related research institutes in mainland China, which includes the Chinese Academy of Science institutes as well as universities. I’ll also describe some on-going projects, including the DAMPE dark matter satellite, the PANDAX dark matter search experiment, the FAST telescope, the Tianlai experiment. I’ll also describe some future projects, such as the Ali-CPT experiment, the QiTai Telescope (QTT), the Discovering the Sky at Longest wavelength lunar satellite array, the China Space Station Telescope, etc. China is also involved in a number of international collaboration projects, including the SKA and TMT.
Venue Block C4, room 268
«The Cosmic Dawn and Epoch of Reionization»
As the first stars and galaxies formed at the end of cosmic dark age, the gas surrounding them get ionized by their radiation, forming ionized bubbles. These bubbles grow until they finally the whole Universe is reionized. After reviewing this general picture of reionization, I describe our model of “neutral islands”, which are large under-dense regions ionized at a later stage of the epoch of reionization. We apply the excursion set theory of large scale structure to this problem and developed analytical and semi-numerical models for reionization. I then discuss the 21cm signatures for the cosmic dawn and epoch of reionization, and also our lunar orbit array project which is designed to probe the EoR.
ECL visit to Paris Center for Cosmological Physics
In the frame of collaboration with APC laboratory, ECL team worked in together with Paris cosmology research group to test microwave kinetic inductance detectors (MKIDs)and participated in data analysis training. Major outcomes: Warming up dilution cryostat. Opening 60K and 3K stages. Installation microwave inductance kinetic detector. Cooling down He3 system and Testing KIDs with difference currents. Simulation on the Sonnet IDE a new design of KIDs. Reducing a Reflection. Test extra Kinetic detectors. Writing a resonator code for Kinetic Inductance Calculation. Resonator Analyzing. Measure impedance date by vector network analyzer and readout system with FPGA. Test APC’s Kinetic detector for thermoconductivity.
During the visit at APC laboratory, ECL team visit to Paris Observatory where microfabrication facility using for detectors fabrication and met Prof. Antoine Kouchner from laboratory Astroparticle and Cosmology APC.
ICEC27-ICMC 2018, Oxford, United Kingdom
Baurzhan Alzhanov participated ICEC27-ICMC 2018 that took place on Monday, 3rd September, 2018 – Friday, 7th September, 2018 on research topic “The cryogenic detector for cosmology observation”.
This paper presents the implementation of Kinetic Inductance Detectors (MKID) for mm/submm astronomy purposes in our cryocooler at Energetic Cosmos Laboratory (ECL). We have used the robust cryocooler 106 Shasta from HPD Company. The refrigerator can cool down the temperature to 30 mK. In this report, we describe our experiences about milli-kelvin refrigerator, implementation challenges of MKIDs in refrigerator and the evaluation results.
WOLTE 13 2018, Sorrento, Italy
Zhaksylyk Kazykenov participated WOLTE 13 held September 10 – 13, 2018 on research topic “Noise Studying of Microwave Kinetic Inductance Detectors”.
Microwave Kinetic Inductance Detectors (MKIDs) are superconducting sensors that can measure energy and number of incident photons at the same time. They can be manufactured in large arrays, each tuned to a specific frequency band. These detectors can be used from sub-mm to X-ray ranges. Noise performance of MKIDs is on of the determinative aspects. Theses detectors found to form excess noise that limits their sensitivity. The noise level depends on many factors starting from the design process finishing with the level of incoming signal. The goal of the research program is to design, realize and test MKIDs in order to measure the photon (from sub-mm to X-Ray) energy and its quantity and arrival time for astronomy studies at ECL. In this poster we will present the theoretical sources of noise in MKIDS and show some results from our experiments.
ECL in the news
Microwave Kinetic Inductance detectors ( MKID) are used for capturing and characterizing mysterious cosmic explosions and bursts.
Marzhan Bekbalanova is working on the readout system of these detectors that uses FPGA to perform digital signal processing.
Baurzhan Alzhanov explains why we need an Adiabatic Demagnetization Refrigertor (ADR) for the MKIDs.
11:25 – 14:15 in the video
2017 Nobel Prize in Physics
for observation of Gravitational Waves
To learn more, see:
- ECL Autumn Workshop Colloquium by Prof. Robert Caldwell (ECL visitor): Gravitational Waves
- Scientific American article (with quote by Prof. Robert Caldwell)
- Nobel Foundation Popular Science Background
Trip to Assi Turgen:
On 13th-17th of November ECL members and Nazarbayev University SST (Physics) Master’s student Magzhan Kistaubayev visited Tien-Shan Astronomy Observatory. We had a collaborative work on short exposure observations with Electron Multiplied CCD (EMCCD) Cameras and tested GRB alerts receipt from NASA’s Swift spacecraft via GRB Coordinate Network.
Photos from the ECL August international conference:
More photos stored on the
We are on news:
The Coldest place of Kazakhstan
2017 Sep. 12- ECL achieves the title of Coldest Place EVER in Kazakhstan
Inside our newly installed Adiabatic Demagnetization refrigerator, we achieved just a few parts in one hundred of a degree above absolute zero to test superconducting super-sensitive sensors…
2017 Aug.- World Experts in Cosmology, Stellar Explosions, Superconducting
Sensors (some from NU!), gather for first international conference … [Read more here]
2017 Jul.- ECL publishes 7th paper on gravitational lensing … [Read more here ]