Dielectronic recombination and stability of warm gas in AGNAstroAtom
Paper presented by Susmita Chakravorty at the 17th International Conference on Atomic Processes in Plasmas, Queen's University Belfast, 19-22 July 2011.
The paper introduces a multi-pass loop voltage controlled ring oscillator. The proposed structure uses cross-coupled PMOS transistors and replica bias with coarse/fine control signal. The design implemented in TSMC 90 nm CMOS technology, 0.9V power supply with frequency tuning range 481MHz to 4.08GHz and -94.17dBc/Hz at 1MHz offset from 4.08GHz with 26.15mW power consumption.
Latest 2014 development of the Spiral Magnetic Motor (SMM) which uses only permanent magnets. This is a work in progress with joint contributors including a physics professor and at least one student. We are encouraged by the fact that for any given volume, magnetic energy exceeds any possible electrical field in air by 50,000. In addition, magnets are also powered by spinning electrons which are sustained by the quantum vacuum and a physics journal article is also in the works to explain the operation as it nears completion. More information at www.integrityresearchinstitute.org
PROJECT DESCRIPTION
DOWNLOAD
The main objective of this project is to develop a device for wireless power transfer. The concept of wireless power transfer was realized by Nikolas tesla. Wireless power transfer can make a remarkable change in the field of the electrical engineering which eliminates the use conventional copper cables and current carrying wires.
Based on this concept, the project is developed to transfer power within a small range. This project can be used for charging batteries those are physically not possible to be connected electrically such as pace makers (An electronic device that works in place of a defective heart valve) implanted in the body that runs on a battery.
The patient is required to be operated every year to replace the battery. This project is designed to charge a rechargeable battery wirelessly for the purpose. Since charging of the battery is not possible to be demonstrated, we are providing a DC fan that runs through wireless power.
This project is built upon using an electronic circuit which converts AC 230V 50Hz to AC 12V, High frequency. The output is fed to a tuned coil forming as primary of an air core transformer. The secondary coil develops a voltage of HF 12volt.
Thus the transfer of power is done by the primary(transmitter) to the secondary that is separated with a considerable distance(say 3cm). Therefore the transfer could be seen as the primary transmits and the secondary receives the power to run load.
Moreover this technique can be used in number of applications, like to charge a mobile phone, iPod, laptop battery, propeller clock wirelessly. And also this kind of charging provides a far lower risk of electrical shock as it would be galvanically isolated.
Dielectronic recombination and stability of warm gas in AGNAstroAtom
Paper presented by Susmita Chakravorty at the 17th International Conference on Atomic Processes in Plasmas, Queen's University Belfast, 19-22 July 2011.
The paper introduces a multi-pass loop voltage controlled ring oscillator. The proposed structure uses cross-coupled PMOS transistors and replica bias with coarse/fine control signal. The design implemented in TSMC 90 nm CMOS technology, 0.9V power supply with frequency tuning range 481MHz to 4.08GHz and -94.17dBc/Hz at 1MHz offset from 4.08GHz with 26.15mW power consumption.
Latest 2014 development of the Spiral Magnetic Motor (SMM) which uses only permanent magnets. This is a work in progress with joint contributors including a physics professor and at least one student. We are encouraged by the fact that for any given volume, magnetic energy exceeds any possible electrical field in air by 50,000. In addition, magnets are also powered by spinning electrons which are sustained by the quantum vacuum and a physics journal article is also in the works to explain the operation as it nears completion. More information at www.integrityresearchinstitute.org
PROJECT DESCRIPTION
DOWNLOAD
The main objective of this project is to develop a device for wireless power transfer. The concept of wireless power transfer was realized by Nikolas tesla. Wireless power transfer can make a remarkable change in the field of the electrical engineering which eliminates the use conventional copper cables and current carrying wires.
Based on this concept, the project is developed to transfer power within a small range. This project can be used for charging batteries those are physically not possible to be connected electrically such as pace makers (An electronic device that works in place of a defective heart valve) implanted in the body that runs on a battery.
The patient is required to be operated every year to replace the battery. This project is designed to charge a rechargeable battery wirelessly for the purpose. Since charging of the battery is not possible to be demonstrated, we are providing a DC fan that runs through wireless power.
This project is built upon using an electronic circuit which converts AC 230V 50Hz to AC 12V, High frequency. The output is fed to a tuned coil forming as primary of an air core transformer. The secondary coil develops a voltage of HF 12volt.
Thus the transfer of power is done by the primary(transmitter) to the secondary that is separated with a considerable distance(say 3cm). Therefore the transfer could be seen as the primary transmits and the secondary receives the power to run load.
Moreover this technique can be used in number of applications, like to charge a mobile phone, iPod, laptop battery, propeller clock wirelessly. And also this kind of charging provides a far lower risk of electrical shock as it would be galvanically isolated.
PROJECT DESCRIPTION
DOWNLOAD
The main objective of this project is to develop a device for wireless power transfer. The concept of wireless power transfer was realized by Nikolas tesla. Wireless power transfer can make a remarkable change in the field of the electrical engineering which eliminates the use conventional copper cables and current carrying wires.
Based on this concept, the project is developed to transfer power within a small range. This project can be used for charging batteries those are physically not possible to be connected electrically such as pace makers (An electronic device that works in place of a defective heart valve) implanted in the body that runs on a battery.
The patient is required to be operated every year to replace the battery. This project is designed to charge a rechargeable battery wirelessly for the purpose. Since charging of the battery is not possible to be demonstrated, we are providing a DC fan that runs through wireless power.
This project is built upon using an electronic circuit which converts AC 230V 50Hz to AC 12V, High frequency. The output is fed to a tuned coil forming as primary of an air core transformer. The secondary coil develops a voltage of HF 12volt.
Thus the transfer of power is done by the primary(transmitter) to the secondary that is separated with a considerable distance(say 3cm). Therefore the transfer could be seen as the primary transmits and the secondary receives the power to run load.
Moreover this technique can be used in number of applications, like to charge a mobile phone, iPod, laptop battery, propeller clock wirelessly. And also this kind of charging provides a far lower risk of electrical shock as it would be galvanically isolated.
In our conventional electronic devices we use semi conducting materials for logical operation and magnetic materials for storage, but spintronics uses magnetic materials for both purposes. These spintronic devices are more versatile and faster than the present one. One such device is Spin Valve Transistors (SVT).
Spin valve transistor is different from conventional transistor. In this for conduction we use spin polarization of electrons. Only electrons with correct spin polarization can travel successfully through the device. These transistors are used in data storage, signal processing, automation and robotics with less power consumption and results in less heat. This also finds its application in Quantum computing, in which we use Qubits instead of bits.
ESS-Bilbao Initiative Workshop. Beam Dynamics Codes: Availability, Sophistica...ESS BILBAO
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LF Energy Webinar: Electrical Grid Modelling and Simulation Through PowSyBl -...DanBrown980551
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Then welcome to this PowSyBl workshop, hosted by Rte, the French Transmission System Operator (TSO)!
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PowSyBl is an open source project hosted by LF Energy, which offers a comprehensive set of features for electrical grid modelling and simulation. Among other advanced features, PowSyBl provides:
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- Grid simulation tools, such as power flows, security analyses (with or without remedial actions) and sensitivity analyses;
The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
What you will learn during the webinar:
- For beginners: discover PowSyBl's functionalities through a quick general presentation and the notebook, without needing any expert coding skills;
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Slack (or Teams) Automation for Bonterra Impact Management (fka Social Soluti...Jeffrey Haguewood
Sidekick Solutions uses Bonterra Impact Management (fka Social Solutions Apricot) and automation solutions to integrate data for business workflows.
We believe integration and automation are essential to user experience and the promise of efficient work through technology. Automation is the critical ingredient to realizing that full vision. We develop integration products and services for Bonterra Case Management software to support the deployment of automations for a variety of use cases.
This video focuses on the notifications, alerts, and approval requests using Slack for Bonterra Impact Management. The solutions covered in this webinar can also be deployed for Microsoft Teams.
Interested in deploying notification automations for Bonterra Impact Management? Contact us at sales@sidekicksolutionsllc.com to discuss next steps.
Kubernetes & AI - Beauty and the Beast !?! @KCD Istanbul 2024Tobias Schneck
As AI technology is pushing into IT I was wondering myself, as an “infrastructure container kubernetes guy”, how get this fancy AI technology get managed from an infrastructure operational view? Is it possible to apply our lovely cloud native principals as well? What benefit’s both technologies could bring to each other?
Let me take this questions and provide you a short journey through existing deployment models and use cases for AI software. On practical examples, we discuss what cloud/on-premise strategy we may need for applying it to our own infrastructure to get it to work from an enterprise perspective. I want to give an overview about infrastructure requirements and technologies, what could be beneficial or limiting your AI use cases in an enterprise environment. An interactive Demo will give you some insides, what approaches I got already working for real.
Neuro-symbolic is not enough, we need neuro-*semantic*Frank van Harmelen
Neuro-symbolic (NeSy) AI is on the rise. However, simply machine learning on just any symbolic structure is not sufficient to really harvest the gains of NeSy. These will only be gained when the symbolic structures have an actual semantics. I give an operational definition of semantics as “predictable inference”.
All of this illustrated with link prediction over knowledge graphs, but the argument is general.
Transcript: Selling digital books in 2024: Insights from industry leaders - T...BookNet Canada
The publishing industry has been selling digital audiobooks and ebooks for over a decade and has found its groove. What’s changed? What has stayed the same? Where do we go from here? Join a group of leading sales peers from across the industry for a conversation about the lessons learned since the popularization of digital books, best practices, digital book supply chain management, and more.
Link to video recording: https://bnctechforum.ca/sessions/selling-digital-books-in-2024-insights-from-industry-leaders/
Presented by BookNet Canada on May 28, 2024, with support from the Department of Canadian Heritage.
Accelerate your Kubernetes clusters with Varnish CachingThijs Feryn
A presentation about the usage and availability of Varnish on Kubernetes. This talk explores the capabilities of Varnish caching and shows how to use the Varnish Helm chart to deploy it to Kubernetes.
This presentation was delivered at K8SUG Singapore. See https://feryn.eu/presentations/accelerate-your-kubernetes-clusters-with-varnish-caching-k8sug-singapore-28-2024 for more details.
Dev Dives: Train smarter, not harder – active learning and UiPath LLMs for do...UiPathCommunity
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See how to accelerate model training and optimize model performance with active learning
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Get an exclusive demo of the new family of UiPath LLMs – GenAI models specialized for processing different types of documents and messages
This is a hands-on session specifically designed for automation developers and AI enthusiasts seeking to enhance their knowledge in leveraging the latest intelligent document processing capabilities offered by UiPath.
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The latest edition of the OT/ICS and IoT security Threat Landscape Report 2024 also covers:
State of global ICS asset and network exposure
Sectoral targets and attacks as well as the cost of ransom
Global APT activity, AI usage, actor and tactic profiles, and implications
Rise in volumes of AI-powered cyberattacks
Major cyber events in 2024
Malware and malicious payload trends
Cyberattack types and targets
Vulnerability exploit attempts on CVEs
Attacks on counties – USA
Expansion of bot farms – how, where, and why
In-depth analysis of the cyber threat landscape across North America, South America, Europe, APAC, and the Middle East
Why are attacks on smart factories rising?
Cyber risk predictions
Axis of attacks – Europe
Systemic attacks in the Middle East
Download the full report from here:
https://sectrio.com/resources/ot-threat-landscape-reports/sectrio-releases-ot-ics-and-iot-security-threat-landscape-report-2024/
3. First observation of neutrons at JSNS
t~9.2ms, l~2.6A, E~12meV
On 30th May 2008
Cong
ra tu l
a tio n
!
STUV:W'XL8YI8ZH
TOF result shows the design of our neutron source
is appropriate.
4. MLF Proton Beam History in FY2008
(As of Feb. 19, 2009)
RFQ became instable
20 kW Beam
20 kW 20 kW
Begin user
Birth of neutron beam
program
First beam at 25Hz
20kW beam delivery
Resume at 5kW
Birth of 100kWeuiv. beam delivery
muon beam
Begin user program
100 kW
equivalent
for short
period
Resume
Resume at 181 MeV at 5 kW
AC power supply fault at RCS
RFQ conditioning
Technical problem in
LH2 cryogenic system at MLF RUN19 in Oct. was dedicated to RFQ conditioning
6. Target station at JSNS
Target station
Irradiated
components
handling
Mercury target room
Proton beam
window
Beam duct Target trolley
7. JSNS Mercury Target System
Hg target : Cross-flow type, Multi wall vessel
Hg leak detectors (Electric circuit, Gas monitoring)
All components of circulation system on target trolley:
EM pump, Compact heat exchanger, Surge tank, etc.
Hot cell : Hands-on maintenance
Vibration measuring system due to pressure wave
Length 12 m
Height 4m
Width 2.6 m
Weight 315 ton
8. JSNS Mercury Target Vessel
Heavy water
Cross flow type
Length 2 m
Mercury
Weight 1.4 ton
Hg flow velocity 0.7 m/s
Hg inventory 1.5 m3
Mercury
Flow vanes
9. JSNS PM pump
Optimization of duct design
FEM analysis on pressure, Lorentz force & Hg flow
Inner wall :3mm
Outer wall :5 mm with ribs
90kW-Motor
Magnets
50 m3/h
1820 mm
0.2 MPa
Mercury duct
840 mm
10. Maintenance in Hot Cell
Dose Estimation
• Several maintenance ! Done by hands-on
– Longer than 10 years interval
• Dose estimation
– Considering residual Hg in piping and valves after Hg drain
– Less than 100 µSv/h at > 12 m
• 203Hg mainly contributes to the dose.
• Hot cell entry is possible.
Estimation in the Hot cell dose
Hands-on maintenance area
Handling
Target vessel Device of
100 µSv/h
exchange truck MRA
In-cell filter
11. Maintenance in Hot Cell
Measurement and Future Entry
Variation of the counting rates
• Separation products selectively during Hg drain
adhere to the piping.
– 188Ir, 185Os
was strongly observed
unexpectedly.
– Dose rates for 188Ir, 185Os were
increased during Hg drain.
– Dose rate after drain is higher than
before that.
• Our dose estimation was so much
underestimated.
• Hot cell entry in future ! Additional Shield
Additional shield of iron with 20
cm thickness will be prepared.
12. First observation of vibarational signal
related to pressure waves at target
Laser Doppler Vibrometer Measured vibration 0.8TP
Range : ±0.1m/s
0.4TP
Accuracy : 5x10-7 m/s < 300kHz
Laser beam Inner plug
Mirror assembly A
Mirror assembly B
Micro-multi
-prism
Target
16. Off-line test on pitting damage by MIMTM
Inventory : 5 L
Stagnant
Flow : 0.3m/s
+Bubble ca.0.1%
17. Off-beam test by MIMTM
Isolate pits
103
104
Crack
Combined pits
105
Pitting formation
106
107
20µm
Futakawa, at al; J. Nucl. Sci. Tech. 40(2003) 895-904
18. Fatigue strength degradation by pitting damage
Kolsterise As received
Kolsterise 4e7
Kolsterise 1e8
1600
316LN20%CW As received
316LN20%CW 5e7
w/o pits
1400
Bending stress, MPa
1200
1000 with pits after 4e7
0.7 !f
800
0.6 !f
600
0.3 !f
400
Cracks
2 3 4 5 6 7 8 9
10 10 10 10 10 10 10 10
4E7 25µm
Number of cycles to failure, N f
1E8
Futakawa, at al; Nucl Mat. 356(2006) 168-177
19. Lifetime estimation of target vessel
taking account of pitting and irradiation damages Pitting damage
Radiation damage
20. Pitting damage reduces lifetime of target
The lifetime at 10 % failure probability
under 1 MW will be reduced to ca 30 hrs
by pitting damage: fatigue and radiation
damages. 300 hrs for 0.8 MW, 2400 hrs for
0.6 MW.
Beam profile
2500 hr at 25 Hz
10000
10000
100
Time to 5 dpa
Failure probability P , %
Pitting damage 8000
8000
Time to 10 % Pf , h
f
75
Time to 5 dpa, h
6000
6000
50
4000
4000
25
2000
2000
0 0
0
0.33 0.45 0.6 0.8 1 0.33 0.45 0.6 0.8 1
Power, MW
Power, MW
Futakawa, at al ; NIM Vol 562(2006), 676-679
22. Effect of flowing on bubble collapse behavior
Micro-jet impact angle is inclined,
because the growth behavior
affected by the flowing. Tanaka, et al, CAV2006 (2006)
23. Effect of micro-jet impact angle
on pit formation
Micro-jet impact angle determined by cavitation bubble collapsing
behavior that is affected by mercury flowing condition.
Pit depth is affected by jet-angle. Almost 1/5 at 45 degree.
24. Flowing improves lifetime ?
Flowing decreases the failure
probability due to the pitting
damage, so that, increase the
Beam profile lifetime of target.
2500 hr at 25 Hz
10000
100 10000
Failure probability P , %
Time to 5 dpa
Stagnant
Stagnant 8000
8000
f
Flowing
Time to 10 % Pf , h
75 Flowing
Time to 5 dpa, h
6000
6000
50
4000
4000
25
2000
2000
0
0
0
0.33 0.45 0.6 0.8 1
0.33 0.45 0.6 0.8 1
Power, MW Power, MW
25. Mechanisms of bubbling mitigation
3 mechanisms for each region
Center of thermal shock : A
B
Absorption
C
A Propagation path : B
Attenuation
Negative pressure field : C
Suppression
Bubble<50 µm
C
B
A
Contraction
Thermal diffusion
Thermal Pressure Kinetic Thermal
expansion wave energy energy
Absorption of the thermal Suppression against cavitation
Attenuation of the pressure
expansion of mercury due to the bubble by compressive
waves due to the thermal
contraction of micro bubbles pressure emitted from gas-
dissipation of kinetic energy
bubble expansion.
Absorption Attenuation Suppression
26. Pressure reduced by micro-gas-bubbles
Normalized peak pressure, P v/Ps
Single phase
!=0.05%
100 !=0.10%
!=0.30%
!=0.50%
!=1.00%
10-1
10-2
Ps=25MPa
10-3
0.1 1 10 100 1000
Bubble radius, µm
Expected pressure reduction by absorption and attenuation
Okita et al., CAV2006 (2006); J Fluid Sci Technol 3 (2008) 116
27. Bubblers applicable to target
to mitigate the pressure waves
Venturi, Needle, Swirl bubblers were investigated in mercury
He gas supply
Venturi
Needle
Venturi
Swirl
Bubbles < 50 µm, that is most effective to reduce pressure waves,
is successfully generated by using in swirl bubbler.
28. Bubble distribution in target vessel
vNumerical simulation
Spherical bubble
Homogeneous bubble size distribution
Assumed bubble size distribution
Bubble distribution is very dependent on
the position of bubbler, which is affected
by flow pattern.
vExperiment in water and mercury
Curving flow channel effect
Bubble coalescence effect
Verification of conventional codes; Star-CD, Fluent, etc.
Water loop test at JAEA
Mercury loop test at TTF
29. Improvement in target system
Gas supplying system Compact target
to reduce waste volume
to control gas pressure
and install bubblers
and flow rate
Bubbler
Gas supply unit
30. Summary
vAt MLF in J-PARC, the first proton beam was injected into
mercury target to yield neutrons on 30th May 2008.
vIn mercury target for pulsed spallation neutron sources, the
cavitation damage induced by pressure waves is a top
issue to increase power level to MW-class.
vOne of prospective techniques to mitigate pressure waves is
to inject micro-bubbles into the mercury.
vSwirl bubbler can generate bubbles <50 µm in mercury, that
is expected to effectively mitigate pressure waves.
vCollaboration with SNS is important. Mockup tests of target
vessel with bubblers will be carried out using TTF loop to
evaluate bubbles’ distribution in target vessel.
31. Bubble distribution in Hg flowing
Hg
Mercury target
A
By FLUENT
Flow guide
B
Proton beam
1m/s
5 mm
C
0.5 mm
D
Bubbling position dependency on distribution: 0.05 mm
B+D positions for bubbles to reach around
window and max. peak position.
Rising effect on bubble distribution
32. Pressure wave mitigation
by A & B mechanisms
0.6 W/O Bubbling
Bubbling
0.4
Velocity, m/s
0.2
0
Proton -0.2
beam
-0.4
Hg loop -0.6
0 0.2 0.4 0.6 0.8 1.0
with bubbler
Time, ms
SNS/JSNS collaboration on pressure wave issue
2005 WNR test for bubble mitigation technology
On-beam test was carried out by using WNR facility to investigate the bubbling effect
on the pressure waves caused by proton beam injection. The displacement velocity
measured by a Laser Doppler Vibrometer L.D.V. was reduced by bubbling.