We present the design and cryogenic characterization of highly sensitive 7 THz lens-antenna-coupled MKIDs for future actively cooled far-infrared space telescopes. This is the highest operating frequency ever demonstrated for antenna-coupled MKIDs. The detector is based on a broadband leaky-wave lens-antenna coupled to a hybrid (Al/NbTiN) CPW MKID. Both the antenna and the photosensitive Al section of the MKID lay on a thin dielectric membrane, improving both the antenna efficiency and the detector sensitivity. The high operating frequency requires the definition of sub-micron features with electron-beam lithography, pristine laser-ablated lenses, and very accurate alignments during assembly. We have tested a prototype chip and have obtained a detector noise equivalent power of 3e-20W/sqrt(Hz) with a high coupling efficiency. Additionally, we have measured the antenna beam pattern. With these measurements we demonstrate a detector system suitable for highly-sensitive (imaging) spectrometers.

The PRobe far-Infrared Mission for Astrophysics (PRIMA) is an actively cooled, infrared observatory for the community for the next decade. On board, an infrared camera, PRIMAger, will provide observers with coverage of mid-infrared to far-infrared wavelengths from about 25 to 264 microns. PRIMAger will offer two imaging modes: the Hyperspectral mode will cover the 25-80 microns wavelength range with a resolution R~10 while the Polarimetric mode will have four broad-band filters, sensitive to polarization, from 80 to 264 microns. These capabilities have been specifically tailored to answer fundamental astrophysical questions such as black hole and star-formation coevolution in galaxies, the evolution of small dust grains over a wide range of redshifts, and the effects of interstellar magnetic fields in various environments, as well as opening a vast discovery space with versatile photometric and polarimetric capabilities.

We present measurements of a polarization sensitive lens-antenna coupled MKID array at 1.5THz, mounted with an additional 20dB neutral density filter in a wide field camera. This allows full end to end system characterization with room temperature optical sources, but under similar optical loading conditions as expected in a space based polarimeter configuration. The system is characterized using a wideband polarized photomixer based phase and amplitude beam pattern setup at 1.5THz. Two separate measurements with orthogonal source polarizations enable the co and cross polarization to be extracted, showing the full system low cross-polarization needed for many future polarimetric applications. Such a measurement setup is additionally of potential interest for the characterization of future missions (for example in the Far Infra-Red): to obtain the optical beam quality and verifying the optical interfaces on a component/sub-component level. We present and discuss this setup and the characterization of the lens-antenna coupled MKID camera.

The Direct Detection Spectrometer Instrument (DDSI) is one of two instruments designed for the Far-IR Spectroscopy Space Telescope (FIRSST) recently proposed to NASA in response to the Astrophysics Probe Explorer call. The DDSI consists of two modules: HR delivering spectra at R~20,000 to 100,000 in three select bands (HR1-3) across 56-184μm, and LR providing broadband spectral coverage at R~100 in four bands (LR1-4) across 35-260 µm. The dispersive element of the HR bands is a compact optical resonator known as a virtually imaged phase array. All DDSI bands use microwave kinetic inductance detector (MKID) arrays cooled to 120mK. The total DDSI MKID pixel count is 2612 pixels.

Advances in far infrared astronomy have been, and will be, defined by instrument capabilities. Especially relevant is the development of imaging spectrometers for the wavelength range of 0.03-3 mm, which are not available at all at this moment. We will discuss recent advances in this field: First, we discuss the development of miniature on-chip spectrometers, that can operate in a 0.09-1 THz by using lossless superconducting circuits to create miniature spectrometers. For higher frequencies this is not possible due to material limitations, moreover instruments have to be operated in space due to the opacity of the atmosphere. Recent proposals for new missions focus on space-based observatories with optics cooled down to 4K, which offer unprecedented spectral imaging speeds, but require large arrays of extremely sensitive detectors. In the second part of this paper we will discuss the development of microwave Kinetic Inductance detectors with a sensitivity of NEP. 3.1.10-20 W/ãHz, sufficient for these applications.

PLATO is an exoplanet hunting mission of the European Space Agency. It is a medium-class mission, with a launch foreseen in 2026. Its prime objective is to uncover Earth-sized planets residing in their habitable zone. The payload consists in 26 cameras with a very wide field of view. These cameras consist in a Telescope Optical Unit, aligned at ambient and characterised at the operational temperature, and a Focal Plane Array bearing the detectors, and delivered after coupling with the Front End Electronics. In this contribution, we report on the alignment of the Engineering Model camera of Plato, i.e., the input metrology, the mechanical alignment of the optical unit with the focal plane array, the test environment and the optical characterisation throughout the process until the integrity check after delivery to the cryo-vacuum testing facility where the camera underwent a thorough performance demonstration. We also give a detailed description of the bolting process and the associated error budget.

espanolEste articulo tiene como objetivo describir el modo en el que los profesionales de la salud despliegan sus estrategias de afrontamiento del estres, asi como tambien, evaluar la relacion entre estos afrontamientos y los niveles de estres percibido y de sintomatologia. Ademas, se propone discutir estos resultados teniendo con el objeto de reflexionar acerca de estrategias de prevencion e intervencion para el escenario actual. La muestra se conformo de 150 sujetos que se desempenaban como profesionales del ambito de la salud. Los instrumentos utilizados fueron el EEP, el COPE-28, la subescala de sintomatologia del CEMTAL y un cuestionario sociodemografico. Se obtuvieron tres modos de Afrontamiento: 1) de Evitacion, 2) de Aproximacion y 3) Emocional. Tambien, se hallaron correlaciones positivas entre el Afrontamiento de Evitacion con el estres percibido y la sintomatologia. Por ultimo, se discute el afrontamiento del estres en el contexto actual de pandemia por COVID-19. EnglishThis article aims to describe the way in which health professionals deploy their stress coping strategies, as well as to evaluate the correlations between coping and levels of perceived stress and symptoms. In addition, it is proposed to discuss these results in order to reflect on prevention and intervention strategies for the current scenario. The sample consisted of 150 subjects who worked as professionals in the field of health. The instruments used were the EEP, COPE-28, the symptomatology subscale of the CEMTAL and a sociodemographic questionnaire. Three Coping profiles were observed: 1) Avoidance, 2) Approach and 3) Emotional. Also, positive correlations were found between Avoidance Coping with perceived stress and symptomatology. Finally, this paper discuss coping with stress in the current context of the COVID-19 pandemic.

Future space-based observatories for the far infrared and sub-mm wave radiation, such as SPICA and the OST telescope, will need ultra-sensitive background limited detectors at frequencies above 1THz. We present a leaky-lens antenna design, composed of a leaky slot fed by a coplanar wave guide, which can be used to couple the absorbed power to a Kinetic Inductance Detector. The slot is coupled to a dielectric lens to achieve directive patterns with a high aperture efficiency. This antenna provides with a frequency coverage over an octave, and can be easily scaled up to 10THz using e-beam lithography.

El presente articulo consiste en una revision bibliografica sistematica para comprender distintos enfoques para el estudio de las trayectorias laborales. Se analizaron 23 articulos y fue posible presentar cuatro enfoques teoricos que subyacen a los estudios relevados: 1) Enfoque historico-economico, 2) Enfoque de interaccion macro-micro, 3) Enfoque de itinerarios centrados en las condiciones organizacionales, y 4) Enfoque de logicas narrativas, sentidos e identidades. Cada enfoque responde a determinada linea de objetivos de investigacion con virtudes y limitaciones. Tambien se realizaron analisis sobre la metodologia implementada por los articulos revisados.

Aquí se despliegan los modelos de intervención desarrollados por un equipo de trabajo argentino en torno a la problemática de la violencia laboral en organizaciones. Se analizan las estrategias desarrolladas en tres modos de demanda: la de los conductores de la organización; la de los representantes sindicales; la de profesionales del cuidado de la salud, teniendo en cuenta sus alcances y limitaciones. Se formaliza el tipo de obstáculos comunes a las estrategias de intervención descriptas, los que hemos identificado y denominado: la neutralización de los antecedentes y de las causas; la neutralización de las consecuencias mediatas e inmediatas; y la psicologización de la violencia. Se delimita seguidamente un conjunto de comportamientos reflexivamente identificados en los equipos de intervención como orientados a regular los flujos emocionales y los vínculos libidinales que se generan en los procesos de actuación y que reciben el nombre de mímesis, híper-representatividad y cancelación imaginaria. En el cierre se analizan las dinámicas que pueden revertir algunos de estos procesos y la razón por la que se los ubica como riesgos.

With increasing array size, it is increasingly important to control stray radiation inside the detector chips themselves. We demonstrate this effect with focal plane arrays of absorber coupled Lumped Element microwave Kinetic Inductance Detectors (LEKIDs) and lens-antenna coupled distributed quarter wavelength Microwave Kinetic Inductance Detectors (MKIDs). In these arrays the response from a point source at the pixel position is at a similar level to the stray response integrated over the entire chip area. For the antenna coupled arrays, we show that this effect can be suppressed by incorporating an on-chip stray light absorber. A similar method should be possible with the LEKID array, especially when they are lens coupled.

An integrated filterbank (IFB) in combination with microwave kinetic inductance detectors (MKIDs), both based on superconducting resonators, could be used to make broadband submillimeter imaging spectrographs that are compact and flexible. In order to investigate the possibility of adopting an IFB configuration for DESHIMA (Delft SRON High-redshift Mapper), we study the basic properties of an IFB circuit using electromagnetic simulation. In an idealized situation, one could integrate onto a 4-inch wafer a 9 pixel × 920 color 3 dimensional imaging device, which instantaneously covers multiple submillimeter telluric windows with a resolving power of f/df = 1000. We also simulate a slightly more realistic situation, in which the dimensions of the filters differ from their designed values, to see how fabrication errors introduce scattering in the transmission of the channels.

Aims. Future astrophysics and cosmic microwave background space missions operating in the far-infrared to millimetre part of the spectrum will require very large arrays of ultra-sensitive detectors in combination with high multiplexing factors and efficient low-noise and low-power readout systems. We have developed a demonstrator system suitable for such applications. Methods. The system combines a 961 pixel imaging array based upon Microwave Kinetic Inductance Detectors (MKIDs) with a readout system capable of reading out all pixels simultaneously with only one readout cable pair and a single cryogenic amplifier. We evaluate, in a representative environment, the system performance in terms of sensitivity, dynamic range, optical efficiency, cosmic ray rejection, pixel-pixel crosstalk and overall yield at an observation centre frequency of 850 GHz and 20% fractional bandwidth. Results. The overall system has an excellent sensitivity, with an average detector sensitivity < NEPdet > = 3 x 10(-19) W / root Hz measured using a thermal calibration source. At a loading power per pixel of 50 fW we demonstrate white, photon noise limited detector noise down to 300 mHz. The dynamic range would allow the detection of similar to 1 Jy bright sources within the field of view without tuning the readout of the detectors. The expected dead time due to cosmic ray interactions, when operated in an L2 or a similar far-Earth orbit, is found to be <4%. Additionally, the achieved pixel yield is 83% and the crosstalk between the pixels is < 30 dB. Conclusions. This demonstrates that MKID technology can provide multiplexing ratios on the order of a 1000 with state-of-the-art single pixel performance, and that the technology is now mature enough to be considered for future space based observatories and experiments.

El siguiente trabajo corresponde a un proyecto de investigacion de maestria de la Universidad de Buenos Aires, el cual se enmarca dentro de la investigacion UBACyT “Hacia un modelo comprensivo de las condiciones de emergencia y de las consecuencias psicosociales del acoso y la violencia en el trabajo. Insumos para intervenciones preventivas y resolutivas orientadas a la salud del trabajador”. En este articulo se desarrollaran los conceptos y alcances teoricos de: cultura organizacional, violencia laboral y de factores psicosociales de riesgo. Asimismo, se mencionan las tecnicas que se utilizaran para la recoleccion de datos y posterior procesamiento.

En este articulo se exploran comparativamente algunas de las percepciones que los trabajadores de organizaciones publicas y privadas tienen acerca de la violencia laboral, asi como las significaciones atribuidas a la misma. El objetivo general del estudio consistio en explorar, identificar y analizar los componentes y factores subjetivos, interaccionales y organizacionales comprometidos en la produccion expresa o potencial de violencia y acoso laboral en organizaciones publicas y privadas. La indagacion consistio en un estudio empirico-descriptivo no experimental transversal de caracter cuanti-cualitativo. Para esta comunicacion se exponen algunos de los hallazgos provenientes del analisis cualitativo. Se implementaron 26 entrevistas semiestructuradas a trabajadores cuyo ambito de desempeno es el publico o el privado, con al menos 6 (seis) meses de antiguedad en organizaciones de la Ciudad Autonoma de Buenos Aires y el Conurbano. El analisis del material es de contenido, a partir de cuatro niveles de codificacion –tematico, abierto, axial, y comparativo – y de categorias de analisis predefinidas: Trabajo/empleo; Sectores publico/privado; Violencia laboral; Formas de acoso laboral; Factores interaccionales.

The main advantage of Microwave Kinetic Inductance Detector arrays (MKID) is their multiplexing capability, which allows for building cameras with a large number of pixels and good sensitivity, particularly suitable to perform large blank galaxy surveys. However, to have as many pixels as possible it is necessary to arrange detectors close in readout frequency. Consequently KIDs overlap in frequency and are coupled to each other producing crosstalk. Because crosstalk can be only minimised by improving the array design, in this work we aim to correct for this effect a posteriori. We analysed a MKID array consisting of 880 KIDs with readout frequencies at 4-8 GHz. We measured the beam patterns for every detector in the array and described the response of each detector by using a two-dimensional Gaussian fit. Then, we identified detectors affected by crosstalk above -30 dB level from the maximum and removed the signal of the crosstalking detectors. Moreover, we modelled the crosstalk level for each KID as a function of the readout frequency separation starting from the assumption that the transmission of a KID is a Lorenztian function in power. We were able to describe the general crosstalk level of the array and the crosstalk of each KID within 5 dB, so enabling the design of future arrays with the crosstalk as a design criterion. In this work, we demonstrate that it is possible to process MKID images a posteriori to decrease the crosstalk effect, subtracting the response of each coupled KID from the original map.

A una muestra de 873 trabajadores de organizaciones publicas de Argentina, se ha administrado el Cuestionario de Evaluacion de Factores Psicosociales (CEFAP) que incluye once dimensiones, con una serie de items con formato tipo Likert organizados de acuerdo con un modelo teorico segun el cual estos cubririan el espectro de factores psicosociales que contextualizan el trabajo. Todos los factores mostraron una alta consistencia interna, con valores α de Cronbach comprendidos entre .49 (Relacion salud-trabajo) y .92 (Apoyo Social y Estima). Ademas, el cuestionario cuenta con un apartado donde se relevan variables sociolaborales. Los resultados indican que el CEFAP reproduce fielmente la estructura del modelo teorico propuesto ampliando lo presentado por otros instrumentos de evaluacion.

Kinetic Inductance Detectors (KIDs) offer excellent sensitivity in the THz region combined with ease of operation. The SPACEKIDS project is working on developments needed to enable this technology for space. It includes development of antenna-coupled and lumped-element KIDS, and of the necessary readout electronics. KID arrays have been developed for both low-background (astrophysical) and high-background (Earth-observing) applications. Two laboratory demonstrator systems are now being used to evaluate kilo-pixel array characteristics and performance in an environment representative of both astronomy (low background) and Earth observing (high-background) applications.